File size: 47,453 Bytes
db9b795
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1
00:00:00,000 --> 00:00:01,260
ู…ูˆุณูŠู‚ู‰

2
00:00:19,490 --> 00:00:23,670
ุจุณู… ุงู„ู„ู‡ ุงู„ุฑุญู…ู† ุงู„ุฑุญูŠู… ู†ุนูˆุฏ ุงู„ุฃู† ู„ุฅูƒู…ุงู„ ู…ุง ุงุจุชุฏู†ุงู‡

3
00:00:23,670 --> 00:00:28,950
ููŠ ุงู„ู…ุญุงุถุฑุฉ ุงู„ู…ุงุถูŠุฉ ูˆู‡ูˆ section 5-7 ุงู„ุฐูŠ ูŠุชุญุฏุซ ุนู†

4
00:00:28,950 --> 00:00:32,350
ุงู„ undetermined coefficients ุงู„ู„ูŠ ู‡ูŠ ุทุฑูŠู‚ุฉ

5
00:00:32,350 --> 00:00:38,110
ุงู„ู…ุนุงู…ู„ุงุช ุงู„ู…ุฌู‡ูˆู„ุฉ ู„ุญู„ ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุชูุงุถู„ูŠุฉุจู†ุญู„ ุจู‡ุฐู‡

6
00:00:38,110 --> 00:00:42,370
ุงู„ุทุฑูŠู‚ุฉ ุฅุฐุง ุชุญู‚ู‚ ููŠ ุงู„ู…ุนุงุฏู„ุฉ ุฃู…ุฑุงู† ุงู„ุฃู…ุฑ ุงู„ุฃูˆู„

7
00:00:42,370 --> 00:00:48,210
ูƒุงู†ุช ุงู„ู…ุนุงู…ู„ุงุช ูƒู„ู‡ุง ุซูˆุงุจุช ู„ู„ู…ุนุงุฏู„ุฉ ุงู„ุชูุงุถู„ูŠุฉ ุงู„ุฃู…ุฑ

8
00:00:48,210 --> 00:00:53,450
ุงู„ุซุงู†ูŠ ุดูƒู„ ุงู„ F of X ุชุจู‚ู‰ ุนู„ู‰ ุดูƒู„ ู…ุนูŠู† ู…ุง ู‡ูˆ ู‡ุฐุง

9
00:00:53,450 --> 00:00:57,810
ุดูƒู„ ุฃุญุฏ ุซู„ุงุซุฉ ุฃู…ูˆุฑ ุงู„ุฃู…ุฑ ุงู„ุฃูˆู„ ุฃู† ูŠูƒูˆู† polynomial

10
00:00:57,810 --> 00:01:01,930
ุงู„ุฃู…ุฑ ุงู„ุซุงู†ูŠ polynomial ููŠ exponential ุงู„ุฃู…ุฑ

11
00:01:01,930 --> 00:01:07,170
ุงู„ุซุงู„ุซ polynomialููŠ exponential ููŠ sin x ุฃูˆ cos x

12
00:01:07,170 --> 00:01:12,390
ุฃูˆ ู…ุฌู…ูˆุนู‡ู…ุง ุฃูˆ ุงู„ูุฑู‚ ููŠู…ุง ุจูŠู†ู‡ู…ุง ูˆุนุทูŠู†ุง ุนู„ู‰ ุฐู„ูƒ ููŠ

13
00:01:12,390 --> 00:01:17,270
ุงู„ู…ุฑุฉ ุงู„ู…ุงุถูŠุฉ ู…ุซุงู„ูŠู† ูˆู‡ุฐุง ู‡ูˆ ุงู„ู…ุซุงู„ ุฑู‚ู… ุชู„ุงุชุฉ ูŠุจู‚ู‰

14
00:01:17,270 --> 00:01:21,270
ุจุฏู†ุง ู†ุญู„ ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุชูุงุถู„ูŠุฉ ุงู„ู„ูŠ ุนู†ุฏู†ุง ู‡ุฐู‡ ุฐูƒุฑู†ุง

15
00:01:21,270 --> 00:01:24,830
ููŠ ุงู„ู…ุฑุฉ ุงู„ู…ุงุถูŠุฉ ุจู†ุฌุฒุฆู‡ุง ุฅู„ู‰ ุฌุฒุฆูŠู† ุจู†ุงุฎุฏ ุงู„

16
00:01:24,830 --> 00:01:28,730
homogeneous ูˆู…ู† ุซู… ุงู„ non homogeneous differential

17
00:01:28,730 --> 00:01:34,790
equationูŠุจู‚ู‰ ุจุฏุงุฌูŠ ุงู‚ูˆู„ู‡ ุงูุชุฑุถ ุงู† Y ุชุณุงูˆูŠ E ุฃูุณ RX

18
00:01:34,790 --> 00:01:45,450
ุจูŠู‡ solution of the homogeneous differential

19
00:01:45,450 --> 00:01:51,890
equation ุงู„ู„ูŠ ู‡ูŠ ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุชุงู„ูŠุฉ Y W Prime ุฒุงุฆุฏ Y

20
00:01:51,890 --> 00:01:57,450
ูŠุณุงูˆูŠ Zero then the characteristic equation

21
00:02:12,070 --> 00:02:18,010
ุงู„ุญู„ ุงู„ู…ุชุฌุงู†ุณ ูŠุจู‚ู‰

22
00:02:22,280 --> 00:02:32,080
The Homogeneous Differential Equation is ูŠูุณุงูˆูŠ

23
00:02:32,080 --> 00:02:40,580
ูŠุงุณุงูˆูŠ ูŠุงุณุงูˆูŠ

24
00:02:40,580 --> 00:02:44,700
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

25
00:02:44,700 --> 00:02:45,880
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

26
00:02:45,880 --> 00:02:47,560
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

27
00:02:47,560 --> 00:02:47,560
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

28
00:02:47,560 --> 00:02:47,560
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

29
00:02:47,560 --> 00:02:47,620
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

30
00:02:47,620 --> 00:02:51,060
ูŠุณุงูˆูŠ ูŠุณุงูˆูŠ

31
00:02:51,060 --> 00:02:56,550
ูŠุณุจุฏูŠ ุฃุฑูˆุญ ุฃุฏูˆุฑ ุนู„ู‰ particular solution ู„ุญู„

32
00:02:56,550 --> 00:03:01,730
ุงู„ู…ุนุงุฏู„ุฉ ุงู„ู„ูŠ ู‡ูŠ non homogeneous ูุจุงุฌูŠ ุจู‚ูˆู„ู‡ the

33
00:03:01,730 --> 00:03:07,970
particular solution

34
00:03:07,970 --> 00:03:17,010
of theDifferential equation start ูˆ ุจุฑูˆุญ ุงู„ู„ูŠ ููˆู‚

35
00:03:17,010 --> 00:03:24,150
ุงู„ุฃุณุงุณูŠุฉ ู‡ุฐูŠ ุจุณู…ูŠู‡ุง star S ู…ุฏูŠู„ู‡ ุงู„ุฑู…ุฒ YP ูˆ ุจุฏูŠ

36
00:03:24,150 --> 00:03:31,510
ุจู‚ูˆู„ ูƒุชุงู„ูŠ X to the power S VุจุฃุฌูŠ ุนู„ู‰ ุดูƒู„ ุงู„ู„ูŠ ู‡ูˆ

37
00:03:31,510 --> 00:03:35,650
ุงู„ุฏุงู„ุฉ ุงู„ู„ูŠ ุนู†ุฏู†ุง ู‡ุฐู‡ ุฑู‚ู… ููŠ sign ูŠุนู†ูŠ polynomial

38
00:03:35,650 --> 00:03:39,790
ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุตูุฑูŠุฉ ู…ุถุฑูˆุจุฉ ููŠ sign ุฅุฐุง ุจุฏูŠ ุฃูƒุชุจ

39
00:03:39,790 --> 00:03:43,630
polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุตูุฑูŠุฉ ููŠ sign ุฒุงุฆุฏ

40
00:03:43,630 --> 00:03:49,090
polynomial ููŠ cosine ูŠุจู‚ู‰ ุจู‚ุฏุฑ ุฃู‚ูˆู„ ู‡ุฐู‡ ุนุจุงุฑุฉ ุนู† a

41
00:03:49,090 --> 00:03:55,610
ููŠ cosine ุงู„ x ุฒุงุฆุฏ b ููŠ sine ุงู„ x ุจุงู„ุดูƒู„ ุงู„ู„ูŠ

42
00:03:55,610 --> 00:04:04,280
ุนู†ุฏู†ุง ู‡ุฐุงุนู†ุฏู…ุง ุฃุจุญุซ ุนู† ู‚ูŠู…ุฉ S ู‡ู„ ู‡ูŠ 0 ุงูˆ 1 ุงูˆ 2 ุงูˆ

43
00:04:04,280 --> 00:04:06,980
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

44
00:04:06,980 --> 00:04:10,500
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

45
00:04:10,500 --> 00:04:10,560
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

46
00:04:10,560 --> 00:04:10,600
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

47
00:04:10,600 --> 00:04:11,400
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

48
00:04:11,400 --> 00:04:11,720
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

49
00:04:11,720 --> 00:04:21,600
3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ 3 ุงูˆ

50
00:04:24,720 --> 00:04:28,780
ุจูˆุงุญุฏ ูˆุดูˆู ู„ูˆ ุญุทูŠุชู‡ุง ุจูˆุงุญุฏ ุจูŠุธู„ ููŠู‡ ุชุดุจู‡ ูˆู„ุง ุจูŠูƒูˆู†

51
00:04:28,780 --> 00:04:34,980
ุงู†ุชู‡ู‰ ู‡ุฐุง ุงู„ุชุดุจู‡ ุฅุฐุง ู„ูˆ ุญุทูŠุช S ุจูˆุงุญุฏ ุจูŠุตูŠุฑ AX Cos

52
00:04:34,980 --> 00:04:41,400
ูˆู‡ู†ุง BX Sin ู‡ู„ ููŠ ุฃูŠ term ู‡ู†ุง ูŠุดุจู‡ ุฃูŠ term ู‡ู†ุง

53
00:04:41,400 --> 00:04:48,920
ุทุจุนุง ู„ุฃ ูŠุจู‚ู‰ ู‡ู†ุง hereู‡ู†ุง ุงู„ S ุชุณุงูˆูŠ ูˆุงุญุฏ ู„ู…ุง ุญุท ุงู„

54
00:04:48,920 --> 00:04:53,740
S ุชุณุงูˆูŠ ูˆุงุญุฏ ุจูŠูƒูˆู† ุฃุฒู„ู†ุง ุงู„ุดุจู‡ ุงู„ู„ูŠ ู…ูˆุฌูˆุฏ ุชู…ุงู…ุง ู…ุง

55
00:04:53,740 --> 00:04:56,880
ุจูŠู† ุงู„ complementary solution ูˆ ุงู„ particular

56
00:04:56,880 --> 00:05:02,600
solution ูŠุจู‚ู‰ ุจู†ุงุก ุนู„ูŠู‡ ู‡ูŠุตุจุญ YP ุนู„ู‰ ุงู„ุดูƒู„ ุงู„ุชุงู„ูŠ

57
00:05:02,600 --> 00:05:12,510
AX ููŠ cosine X ุฒุงุฆุฏ BX ููŠ sine Xุงู„ุงู† ุจุฏู†ุง ู†ุญุฏุฏ

58
00:05:12,510 --> 00:05:19,010
ู‚ูŠู…ุชูŠู† ุซูˆุงุจุช ุงู„ A ูˆ ุงู„ B ู„ุฐู„ูƒ ุจุฏูŠ ุงุดุชู‚ ู…ุฑุฉ ูˆ ุงุชู†ูŠู†

59
00:05:19,010 --> 00:05:26,590
ูˆ ุงุนูˆุถ ููŠ ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุฃุตู„ูŠุฉ ูŠุจู‚ู‰ ุจุฏูŠ ุงุฎุฏ Y P Prime

60
00:05:26,930 --> 00:05:34,310
ู‡ุฐู‡ ุงู„ู…ุดุชู‚ุฉ ุญุตู„ ุถุฑุจ ุฏุงู„ุชูŠู† ูŠุจู‚ู‰ a ููŠ cos x ู†ุงู‚ุต ax

61
00:05:34,310 --> 00:05:41,070
ููŠ sin x ุฒุงุฆุฏ ูƒู…ุงู† ู‡ุฐู‡ ุญุตู„ ุถุฑุจ ุฏุงู„ุชูŠู† ูŠุจู‚ู‰ b ููŠ

62
00:05:41,070 --> 00:05:50,100
sin x ุฒุงุฆุฏ bx ููŠ cos xูŠุจู‚ู‰ ุงุดุชู‚ู†ุง ูƒู„ู‡ ู…ู† X ูˆ Cos X

63
00:05:50,100 --> 00:05:56,040
ูˆ X ูˆ Sin X ูƒุญุงุตู„ ุถุฑุจ ุฏู„ุชูŠู… ู‡ุฐุง ุญุตู„ู†ุง ุนู„ู‰ Y' ุทุจุนุง

64
00:05:56,040 --> 00:06:00,020
ู…ุงููŠุด ูˆ ู„ุง term ุฒูŠ ุงู„ุชุงู†ูŠ ูŠุจู‚ู‰ ุจูŠุฎู„ูŠ ูƒู„ ุดูŠ ุฒูŠ ู…ุง

65
00:06:00,020 --> 00:06:06,500
ู‡ูˆ ุจุฏู†ุง ู†ุฑูˆุญ ู†ุฌูŠุจ YPW' ูŠุจู‚ู‰ ุจุฏู†ุง ุงุดุชู‚ ู‡ุฐู‡ ุจุงู„ุณุงู„ุจ

66
00:06:06,500 --> 00:06:16,830
A Sin X ูˆู‡ุฐู‡ ุงู„ุณุงู„ุจ A Sin Xุจุนุฏ ุฐู„ูƒ ุงุชุณุงู„ุจ ax ููŠ

67
00:06:16,830 --> 00:06:23,190
cos x ุงุดุชู‚ุช ู‡ุฐู‡ ุญุตู„ ุถุฑุจ ุฏู„ุชูŠู† ุจู†ุงู†ูŠุฌ ุงู„ู„ูŠ ุจุนุฏู‡ุง

68
00:06:23,190 --> 00:06:29,610
ูŠุจู‚ู‰ ุฒุงุฆุฏ b ููŠ cos x ุฎู„ุตู†ุง ู…ู†ู‡ุง ุจุฏุฃุช ุงุดุชู‚ ู‡ุฐู‡ ุญุตู„

69
00:06:29,610 --> 00:06:38,190
ุถุฑุจ ุฏู„ุชูŠู† ูŠุจู‚ู‰ ุฒุงุฆุฏ b ููŠ cos x ู†ุงู‚ุต bx ููŠ sin x

70
00:06:38,620 --> 00:06:42,780
ูŠุจู‚ู‰ ุงุดุชู‚ู†ุงู‡ ุญุตู„ ุถุฑุจ ุฏู„ุชูŠู† ู‡ู†ุง ููŠ ุจุนุถ ุงู„ุนู†ุงุตุฑ

71
00:06:42,780 --> 00:06:50,640
ู…ุชุดุงุจู‡ุฉ ู‡ูŠ ุนู†ุฏ ู‡ู†ุง ุณุงู„ุจ ุงุชู†ูŠู† a ููŠ sine ุงู„ X ูˆุนู†ุฏูŠ

72
00:06:50,640 --> 00:06:56,880
ูƒู…ุงู† ุฒุงุฆุฏ ุงุชู†ูŠู† b ููŠ cosine ุงู„ X ู‡ุฏูˆู„ ุงุชู†ูŠู† ู…ุน ุจุนุถ

73
00:06:56,880 --> 00:07:03,720
ูˆ ู‡ุฏูˆู„ ุงุชู†ูŠู† ู…ุน ุจุนุถ ุจุงู‚ูŠ ุนู†ุฏูŠ ู†ุงู‚ุต ax ููŠ cosine ุงู„

74
00:07:03,720 --> 00:07:10,180
X ูˆู†ุงู‚ุต bx ููŠ sine ุงู„ Xุจุนุฏ ุฐู„ูƒ ุงุฎุฐ ุงู„ู…ุนู„ูˆู…ุงุช ุงู„ู„ู‰

75
00:07:10,180 --> 00:07:15,040
ุญุตู„ุช ุนู„ูŠู‡ุง ูˆ ุงุนูˆุถ ููŠ ุงู„ู…ุนุงุฏู„ุฉ star ูŠุจู‚ู‰ ู‡ู†ุง

76
00:07:15,040 --> 00:07:23,320
substitute in

77
00:07:23,320 --> 00:07:33,740
the differential equation star we get ุจู†ุญุตู„ ุนู„ู‰ ู…ุง

78
00:07:33,740 --> 00:07:34,200
ูŠุฃุชูŠ

79
00:07:40,110 --> 00:07:43,630
ูŠุฌุจ ุงู† ุงุฒุงู„ุฉ ูˆูŠ ุฏุงุจู„ูŠ ุจุฑุงูŠู… ูˆุงุญุท ู‚ูŠู…ุชู‡ุง ูˆูŠ ุฏุงุจู„ูŠ

80
00:07:43,630 --> 00:07:48,950
ุจุฑุงูŠู… ู‡ูŠ ุญุตู„ู†ุง ุนู„ูŠู‡ุง ูŠุจู‚ู‰ ู†ุงู‚ุต ุงุชู†ูŠู† ุงู ุตูŠู†

81
00:07:48,950 --> 00:07:55,980
ุงู„ุฒุงูˆูŠุฉ ุซุชุง ุตูŠู† ุงู„ุฒุงูˆูŠุฉ Xุชู…ุงู…ุŸ ุงู„ู„ูŠ ุจุนุฏู‡ุง ุฒุงุฆุฏ

82
00:07:55,980 --> 00:08:04,340
ุงุชู†ูŠู† B ููŠ cosine ุงู„ X ุงู„ู„ูŠ ุจุนุฏู‡ุง ู†ุงู‚ุต ุงู„ AX ููŠ

83
00:08:04,340 --> 00:08:11,080
cosine ุงู„ X ู†ุงู‚ุต ุงู„ BX ููŠ sine ุงู„ X ู‡ุฐุง ูƒู„ู‡ ุงู„ู„ูŠ

84
00:08:11,080 --> 00:08:17,400
ุฃุฎุฏุชู‡ ู…ูŠู†ุŸ YW prime ุถุงูŠู‚ ู„ู†ุง ู…ูŠู†ุŸ Y ูˆูŠู† Y ู‡ุงูŠู‡ุงุŸ

85
00:08:17,400 --> 00:08:24,560
ุจุฏู‡ ุฃุฌู…ุนู‡ู… ู‡ุฏูˆู„ ูŠุจู‚ู‰ ุฒุงุฆุฏู‡ู‡ ุงู„ู„ูŠ ู‡ูˆ ู…ูŠู† ax ููŠ cos

86
00:08:24,560 --> 00:08:33,520
x ูˆ ุจุนุฏ ู‡ูŠ ูƒุฏู‡ ุฒุงุฆุฏ bx ููŠ sin x ูƒู„ู‡ ุจูŠุณูˆูŠ ุงู„ุทุฑู

87
00:08:33,520 --> 00:08:40,300
ุงู„ู„ูŠ ูŠุชุจุน ุงู„ู…ุนุงุฏู„ุฉ ุงู„ู„ูŠ ู‡ูˆ 4 ููŠ sin xุจู†ุฌูŠ ู†ุฌู…ุน ุนู†ุง

88
00:08:40,300 --> 00:08:47,940
ax cos ุจุงู„ุณุงู„ุจ ูˆ ax cos ุจุงู„ู…ูˆุฌุจ ุนู†ุง bx sin ุจุงู„ุณุงู„ุจ

89
00:08:47,940 --> 00:08:53,220
ูˆ bx ุจูŠู…ูŠู† ุจุงู„ู…ูˆุฌุจ ูŠุจู‚ู‰ ุตูุฉ ุงู„ู…ุนุงุฏู„ุฉ ุนู„ู‰ ุงู„ุดูƒู„

90
00:08:53,220 --> 00:09:00,740
ุงู„ุชุงู„ูŠ ู†ุงู‚ุต ุงุชู†ูŠู† a sin x ุฒุงุฆุฏูŠ ุงุชู†ูŠู† b cos x ูƒู„ู‡

91
00:09:00,740 --> 00:09:07,540
ุจุฏู‡ ูŠุณูˆูŠ ุงุฑุจุน sin xุจุนุฏ ุฐู„ูƒ ู†ู‚ุฑุฑ ุงู„ู…ุนุงู…ู„ุงุช ููŠ

92
00:09:07,540 --> 00:09:13,340
ุงู„ุทุฑููŠู† ุฅุฐุง ู„ูˆ ู‚ุฑุฑู†ุง ุงู„ู…ุนุงู…ู„ุงุช ููŠ ุงู„ุทุฑููŠู† ุจุณู†ุง ู†ู‚ุต

93
00:09:13,340 --> 00:09:19,580
ุงุชู†ูŠู† a ุจุฏูŠ ุณุงูˆูŠ ู‚ุฏุงุด ุงุฑุจุนุฉ ูˆุนู†ุฏูƒ ุงุชู†ูŠู† b ุจุฏูŠ ุนู†ุฏูŠ

94
00:09:19,580 --> 00:09:26,520
cosine ู‡ู†ุง ู…ุงุนู†ุงุด ูŠุจู‚ู‰ ุจูŠู‡ zero ู‡ุฐุง ู…ุนู†ุงู‡ ุงู† ุงู„ a

95
00:09:26,520 --> 00:09:33,330
ุชุณุงูˆูŠ ุณุงู„ุจ ุงุชู†ูŠู† ูˆ ุงู„ b ุชุณุงูˆูŠ zeroูŠุจู‚ู‰ ุฃุตุจุญ ุดูƒู„ ุงู„

96
00:09:33,330 --> 00:09:46,570
YP ุนู„ู‰ ุงู„ุดูƒู„ ุงู„ุชุงู„ูŠ ูŠุจู‚ู‰

97
00:09:46,570 --> 00:09:50,570
ุฃุตุจุญ ู‡ุฐุง ุดูƒู„ ุงู„ YP

98
00:10:01,840 --> 00:10:11,150
Y ูŠุณุงูˆูŠ YC ุฒุงุฆุฏ YPูŠุจู‚ู‰ ุจู†ุงุก ุนู„ูŠู‡ ูŠุตุจุญ y ูŠุณูˆูŠ yc ู‡ูŠ

99
00:10:11,150 --> 00:10:20,070
ุงู„ู…ูˆุฌูˆุฏ ุนู†ุฏู‰ ูŠุจู‚ู‰ c1 cos x ุฒุงุฆุฏ c2 ููŠ sin x ูˆุฒุงุฆุฏ

100
00:10:20,070 --> 00:10:28,010
yp ู†ุงู‚ุต 2x ููŠ cos x ูŠุจู‚ู‰ ู‡ุฐุง ุงู„ุญู„ ุงู„ู†ู‡ุงุฆูŠ ุชุจุน ู…ู†ุŸ

101
00:10:28,010 --> 00:10:32,990
ุชุจุน ุงู„ู…ุนุงุฏู„ุฉ ู„ุงุญุธู‰ ูˆู„ุง term ู…ู† ุงู„ุชู„ุงุช termุงุช ุฒู‰

102
00:10:32,990 --> 00:10:38,240
ุงู„ุชุงู†ู‰ ู…ุงููŠุด ุชุดุงุจู‡ุจูŠู† ุฃูŠ term ูˆุงู„term ุงู„ุซุงู†ูŠ

103
00:10:38,240 --> 00:10:46,440
ุงู„ู…ุซุงู„ ุฑู‚ู… ุฃุฑุจุน ูŠุจู‚ู‰ example ุฃุฑุจุน

104
00:10:46,440 --> 00:10:50,720
ุจู‚ูˆู„

105
00:10:50,720 --> 00:10:56,260
ุฏูŠ term a suitable

106
00:10:56,260 --> 00:11:03,480
form ุดูƒู„

107
00:11:03,480 --> 00:11:09,990
ู…ู†ุงุณุจFor the

108
00:11:09,990 --> 00:11:19,330
particular solution

109
00:11:19,330 --> 00:11:23,490
of the

110
00:11:23,960 --> 00:11:32,520
Differential equation ู„ู„ู…ุนุงุฏู„ุฉ ุงู„ุชูุงุถู„ูŠุฉ YW' ู†ุงู‚ุต

111
00:11:32,520 --> 00:11:49,540
4Y' ุฒุงุฆุฏ 4Y ูŠุณุงูˆูŠ 2X ุชุฑุจูŠุน ุฒุงุฆุฏ 4X E ุฃุณ 2Xุฒุงุฆุฏ ุงูƒุณ

112
00:11:49,540 --> 00:11:55,100
ููŠ ุตูŠู† ุงุชู†ูŠู† ุงูƒุณ ูˆู‡ุฐู‡ ุจุฏูŠ ุงุณู…ูŠู‡ุง ุงู„ู…ุนุงุฏู„ุฉ ู‡ูŠ ู…ู†

113
00:11:55,100 --> 00:12:00,960
ุงู„star ูˆุจูŠู† ุฌุณูŠู† don't

114
00:12:00,960 --> 00:12:07,800
don't evaluate the

115
00:12:07,800 --> 00:12:08,620
constants

116
00:12:38,460 --> 00:12:43,640
ู‚ุงู„ุจ ุงู„ูƒูˆูŠู†ุฉ ุชุงู†ูŠู†ู‚ุฑุฃ ุงู„ุณุคุงู„ ู…ุฑุฉ ุชุงู†ูŠุฉ ูˆู†ุดูˆู ุดูˆ

117
00:12:43,640 --> 00:12:51,120
ุงู„ู…ุทู„ูˆุจ ุจูŠู‚ูˆู„ู„ูŠ ุญุฏุฏ ุญู„ ููŠ ุดูƒู„ ู…ู†ุงุณุจ ู„ู„ particular

118
00:12:51,120 --> 00:12:54,400
solution y, z ุชุจุน ุงู„ differential equation ู‡ุฐุง

119
00:12:54,400 --> 00:12:57,020
ูŠุจู‚ู‰ ุงู„ู†ุงุณ ุจุชุญุฏุฏ ุดูƒู„ ุงู„ particular solution

120
00:12:57,020 --> 00:13:00,840
ูˆูŠู‚ูˆู„ู„ูŠ ู…ุง ุชุญุณุจุด ุงู„ุซูˆุงุจุช ุงุถุงูŠุน ุดูˆุงุฌุฏูƒ ูˆุงู†ุช ุจุชุฌูŠุจ

121
00:13:00,840 --> 00:13:04,120
ุงู„ู…ุดุชู‚ุฉ ุงู„ุฃูˆู„ู‰ ูˆุงู„ุชุงู†ูŠุฉ ูˆุงุชุนูˆุถ ููŠ ุงู„ู…ุนุงุฏู„ุฉ ูˆุงุชุฌูŠุจ

122
00:13:04,120 --> 00:13:07,940
ู„ูŠู‡ ุฌุฏูŠุด ู‚ูŠู…ุฉ a ูˆb ุงูˆ a ูˆb ูˆc ูˆู…ุง ุฅู„ุง ุจุชุฏูŠุด ู‚ูŠู…ุฉ

123
00:13:07,940 --> 00:13:11,650
ุซูˆุงุจุช ุจุณ ู‡ุชู„ูŠ ุดูƒู„ mainุงู„ู€ Particular solution ู„ูŠุณ

124
00:13:11,650 --> 00:13:15,790
ู„ุงุฒู… ูŠูƒูˆู† ู‚ูŠู…ุชู‡ ุซุงู…ุชู‡ ุจู‚ูˆู„ู‡ ูƒูˆูŠุณ ูŠุจู‚ู‰ ูŠุญุชุงุฌ

125
00:13:15,790 --> 00:13:20,350
ู„ู„ู…ุนุงุฏู„ุฉ ูŠุญุชุงุฌ ุฃู† ูŠุฃุฎุฐ ุงู„ู€Homogeneous differential

126
00:13:20,350 --> 00:13:24,550
equation ูŠุจู‚ู‰ ูŠุจุฏุฃ ูƒู…ุง ุจุฏุฃุช ููŠ ุงู„ู…ุซุงู„ ุงู„ู„ูŠ ู‚ุจู„ู‡

127
00:13:24,550 --> 00:13:29,290
let Y ุชุณุงูˆูŠ E ุฃูุณ RX ุจุฅูŠู‡ุŸ

128
00:13:41,220 --> 00:13:50,680
ูŠุจู‚ู‰ ุจุงุฌูŠ ุจู‚ูˆู„ู‡ the characteristicEquation is R

129
00:13:50,680 --> 00:13:56,060
ุชุฑุจูŠุน ู†ุงู‚ุต ุงุฑุจุนุฉ R ุฒุงุฆุฏ ุงุฑุจุนุฉ ูŠุณุงูˆูŠ Zero ุงูˆ ุงู†

130
00:13:56,060 --> 00:14:02,560
ุดุฆุชู… ูู‚ูˆู„ูˆุง R ู†ุงู‚ุต ุงุชู†ูŠู† ู„ูƒู„ ุชุฑุจูŠุน ุชุณุงูˆูŠ Zero ุงูˆ

131
00:14:02,560 --> 00:14:09,370
ุงู„ R ุชุณุงูˆูŠ ุงุชู†ูŠู† ูˆุงู„ุญู„ ู‡ุฐุง ู…ูƒุจุฑ ูƒู… ู…ุฑุฉุŸูŠุจู‚ู‰ ู…ุฑุชูŠู†

132
00:14:09,370 --> 00:14:12,850
ูŠุจู‚ู‰ of multiplicity two

133
00:14:19,800 --> 00:14:25,640
2 ูŠุนู†ูŠ ุงู„ุญู„ ู…ูƒุฑุฑ ู…ุฑุชูŠู† ุจู†ุงุก ุนู„ูŠู‡ ุจุฑูˆุญ ุจู‚ูˆู„ู‡ ู‡ู†ุง

134
00:14:25,640 --> 00:14:32,220
ูŠุจู‚ู‰ solution yc ุจุฏู‡ ูŠุณุงูˆูŠ ุงู„ุญู„ real ูˆ ู…ูƒุฑุฑ ู…ุฑุชูŠู†

135
00:14:32,220 --> 00:14:38,680
ูŠุจู‚ู‰ c1 ุฒุงุฆุฏ c2x e ุงุต r

136
00:14:44,740 --> 00:14:49,820
ุจู†ุจุฑูˆุฒ ู‡ุฐุง ุงู„ุญู„ ูˆ ุจู†ุณูŠุจู‡ ูˆ ุจู†ุฑูˆุญ ู†ุฑุฌุนู„ู‡ ุจุนุฏ ู‚ู„ูŠู„

137
00:14:49,820 --> 00:14:52,800
ุงู„ุงู† ุจุฏู†ุง ู†ูŠุฌูŠ ู„ู„ non homogeneous differential

138
00:14:52,800 --> 00:14:56,280
equation ุงู„ู„ูŠ ุงู„ star ุงู„ู„ูŠ ุนู†ุฏู†ุง ุจุฏู†ุง ู†ุชุทู„ุน ุนู„ู‰

139
00:14:56,280 --> 00:15:00,240
ุดูƒู„ ุงู„ F of X ุงู„ู„ูŠ ู‡ูˆ ุงู„ุดูƒู„ ุงู„ู„ูŠ ุนู†ุฏู†ุง ู‡ุฐุง ู‡ู„ ู‡ูŠ

140
00:15:00,240 --> 00:15:05,740
polynomial ูู‚ุทุŸุฃูˆ polynomial ููŠ exponential ุฃูˆ

141
00:15:05,740 --> 00:15:09,360
polynomial ููŠ sin ุฃูˆ cos ุงู„ู…ุฌู…ูˆุนุฉ ุงู„ุญู…ุฏ ู„ู„ู‡ ุฌุงูŠุจุฉ

142
00:15:09,360 --> 00:15:13,720
ุงู„ุชู„ุช ุญุงู„ุงุช ูƒู„ู‡ู… ุจุณุคุงู„ ุงู†ูˆุงุนูŠ ู‡ูŠ polynomial ู…ู†

143
00:15:13,720 --> 00:15:17,180
ุงู„ุฏุฑุฌุฉ ุงู„ุซุงู†ูŠุฉ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ

144
00:15:17,180 --> 00:15:21,820
exponential polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ sin ุฅุฐุง

145
00:15:21,820 --> 00:15:27,630
ุฅูŠุด ู‡ุนู…ู„ ููŠ ุงู„ู…ุนุงุฏู„ุฉ ุงู„ู„ูŠ ุนู†ุฏูŠุŸู‡ุฌุฒู‚ู‡ุง ุฅู„ู‰ ุซู„ุงุซ

146
00:15:27,630 --> 00:15:31,690
ู…ุนุงุฏู„ุงุช ุชู…ุงู…ุŸ ูˆ ุฃุญู„ ูƒู„ ูˆุงุญุฏุฉ ููŠู‡ู… ูˆ ุฃุฌูŠุจ ุงู„

147
00:15:31,690 --> 00:15:35,390
particular solution ุชุจุนู‡ุง ูˆ ุฃุฌู…ุน ุงู„ุญู„ูˆู„ ุงู„ุชู„ุงุชุฉ

148
00:15:35,390 --> 00:15:38,810
ุจูŠุนุทูŠู†ูŠ ุงู„ particular solution ู„ู…ูŠู†ุŸ ู„ู„ู…ุนุงุฏู„ุงู†ุฉ

149
00:15:38,810 --> 00:15:43,970
ุทุจู‚ุง ู„ุงู„ู†ุธุฑูŠุฉ ุงู„ู„ูŠ ุฃุนุทุงู†ูŠู‡ุง ู„ูƒู… ููŠ ุฃูˆู„ section ููŠ

150
00:15:43,970 --> 00:15:46,970
ุงู„ non homogeneous differential equation ู‚ูˆู„ู†ุงู„ูƒูˆุง

151
00:15:46,970 --> 00:15:53,150
ู‡ุฐุง ุจูŠู„ุฒู…ู†ุง ู„ู…ูŠู†ุŸ ู„ู„ sections ุงู„ู‚ุงุฏู…ุฉ ุชู…ุงู…ุŸ ูŠุจู‚ู‰

152
00:15:53,150 --> 00:16:01,260
ุจุฏุงุฌูŠ ุฃู‚ูˆู„ู‡ ู‡ู†ุงdifferential equation star is

153
00:16:01,260 --> 00:16:08,360
written as ูŠู…ูƒู†ู†ุง ุฃู† ู†ูƒุชุจู‡ุง ุนู„ู‰ ุงู„ุดูƒู„ ุงู„ุชุงู„ูŠ ุงู„ู€ y

154
00:16:08,360 --> 00:16:14,460
double prime ู†ุงู‚ุต ุฃุฑุจุนุฉ y prime ุฒุงุฆุฏ ุฃุฑุจุนุฉ y ูŠุณูˆู‰

155
00:16:14,460 --> 00:16:20,580
ูƒู…ุŸ ูŠุณูˆู‰ ุงุชู†ูŠู† x ุชุฑุจูŠุน ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุซุงู†ูŠุฉ ุงู„ู„ูŠ ู‡ูŠ

156
00:16:20,580 --> 00:16:33,690
ู…ูŠู†ุŸYW'-4Y'ุฒุงุฆุฏ 4Y ูŠุณุงูˆูŠ 4XE2X

157
00:16:33,690 --> 00:16:45,370
ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุชุงู„ุชุฉ YW'-4Y'ุฒุงุฆุฏ 4Y ูŠุณุงูˆูŠ XSIN2X ูŠุณุงูˆูŠ

158
00:16:45,370 --> 00:16:50,350
X ููŠ SIN2X ุจุงู„ุดูƒู„ ุงู„ู„ูŠ ุนู†ุฏู†ุง ู‡ุฐุง

159
00:16:58,280 --> 00:17:03,840
ุทูŠุจุŒ ุงู„ุขู† ูŠุนู†ูŠ ูƒุฃู†ู‡ ุตุงุฑ ุนู†ุฏูŠ ู…ุด ู…ุณุฃู„ุฉ ูˆุงุญุฏุฉุŒ ุซู„ุงุซ

160
00:17:03,840 --> 00:17:07,120
ู…ุณุงุฆู„ุŒ ุจุฏูŠ ุฃุญู„ ูƒู„ ูˆุงุญุฏ ุฃุฌูŠุจ ุงู„ particle solution

161
00:17:07,120 --> 00:17:12,980
ูƒุฃู†ู‡ ู„ุง ุนู„ุงู‚ุฉ ู„ู‡ุง ุจู…ูŠู† ุจุงู„ุงุฎุฑู‰ุŒ ูŠุจู‚ู‰ ู‡ู†ุง ุจุฏูŠ ุฃุฌูŠุจ

162
00:17:12,980 --> 00:17:20,180
ุงู„ YP1 ูŠุจู‚ู‰ YP1 ูŠุณุงูˆูŠ X to the power S ููŠู‡ุŒ ู‡ุฐู‡

163
00:17:20,180 --> 00:17:21,740
polynomial ู…ู† ุงู„ุฏุฑุฌุฉ

164
00:17:34,810 --> 00:17:40,490
ู‡ู„ ุงูŠ term ู…ู† ู‡ู†ุง ูŠุดุจู‡

165
00:17:40,490 --> 00:17:42,250
ุงูŠ term ููˆู‚ุŸ

166
00:17:45,280 --> 00:17:52,060
ู…ุถุฑูˆูุฉ ูŠุนู†ูŠ ู‡ุฐุง C1 E2 X ูˆ C2 X E2 ููŠู‡ุŸ ู…ุงุนู†ุฏูŠุด

167
00:17:52,060 --> 00:17:56,020
exponential ู‡ู†ุงูƒ ุจู…ุงููŠุด ูŠุจุฌู‰ ู‡ู†ุง S ุจู‚ุฏุฑ ุงูŠู‡ุŸ ุจ

168
00:17:56,020 --> 00:18:03,680
Zero ูŠุจุฌู‰ here ุงู„ S ุชุณุงูˆูŠ Zero ูŠุจุฌู‰ ุฃุตุจุญ Y P1 ุจุฏู‡

169
00:18:03,680 --> 00:18:11,780
ูŠุณุงูˆูŠ A0 X ุชุฑุจูŠุน ุฒุงุฆุฏ A1 X ุฒุงุฆุฏ A2 ุณูŠุจูˆู†ุง ู…ู† ู‡ุฐุง

170
00:18:11,780 --> 00:18:20,370
ู†ู†ุชู‚ู„ ุนู„ู‰ ุงู„ู„ูŠ ุจุนุฏู‡ุงูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ ูŠุจู‚ู‰

171
00:18:20,370 --> 00:18:23,230
ุจุฏูŠ ุฃูƒุชุจ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€

172
00:18:23,230 --> 00:18:26,990
exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ

173
00:18:26,990 --> 00:18:32,070
ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial

174
00:18:32,070 --> 00:18:34,410
ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ

175
00:18:34,410 --> 00:18:37,350
polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ exponential

176
00:18:37,350 --> 00:18:37,350
ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€

177
00:18:37,350 --> 00:18:37,390
exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ

178
00:18:37,390 --> 00:18:38,650
ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial

179
00:18:38,650 --> 00:18:38,870
ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ

180
00:18:38,870 --> 00:18:39,870
polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ exponential

181
00:18:39,870 --> 00:18:40,510
ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€

182
00:18:40,510 --> 00:18:42,530
exponential ูŠุจู‚ู‰ ุจุฏูŠ ุฃูƒุชุจ polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃ

183
00:18:42,560 --> 00:18:55,400
ู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X

184
00:18:55,400 --> 00:18:56,780
to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S

185
00:18:56,780 --> 00:18:58,460
ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X

186
00:18:58,460 --> 00:18:58,680
to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S

187
00:18:58,680 --> 00:18:58,680
ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X

188
00:18:58,680 --> 00:18:58,680
to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S

189
00:18:58,680 --> 00:18:58,680
ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X

190
00:18:58,680 --> 00:18:58,680
to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S

191
00:18:58,680 --> 00:18:59,380
ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X

192
00:18:59,380 --> 00:19:03,500
to the power S ูˆู‡ูˆ ูŠุฌุจ ุฃู† ุฃุบุทูŠ X to the powerุทุจ

193
00:19:03,500 --> 00:19:10,940
ุจุฏู‡ ุงุญุท S ุจู‚ุฏุงุดุŸ ุจูˆุงุญุฏ ู„ูˆ ุญุทูŠุช S ุจูˆุงุญุฏ ุจุตูŠุฑ B0 X

194
00:19:10,940 --> 00:19:15,420
ุชุฑุจูŠุฉ ููŠ ุงู„ exponential ููŠู‡ ููˆู‚ ุฒูŠู‡ุง ุทูŠุจ ู†ุดูˆู ู‡ุฐู‡

195
00:19:15,420 --> 00:19:21,930
B1 X ููŠ ุงู„ exponentialููŠ ุฒูŠู‡ุง ูŠุจู‚ู‰ S ุชุณุงูˆูŠ ูˆุงุญุฏ ู…ุด

196
00:19:21,930 --> 00:19:26,830
ุตุญูŠุญุฉ ูŠุจู‚ู‰ ุงุญุท S ุจู‚ุฏุฑุด ุฅุฐุง ู„ูˆ ุญุทูŠุช ุงู„ S ุจุงุชู†ูŠู†

197
00:19:26,830 --> 00:19:31,210
ุจูŠุถู„ ููŠ ุงู†ุฏูŠ ุชุดุงุจู‡ ูŠุจู‚ู‰ ุงุชู‚ุงู„ู„ู‡ ูŠุจู‚ู‰ ุจู‚ูˆู„ู‡ here

198
00:19:31,210 --> 00:19:39,310
ู‡ู†ุง ุงู„ S ุชุณุงูˆูŠ ุงุชู†ูŠู† ูŠุจู‚ู‰ ุงุตุจุญ Y P2 ุจุฏู„ ุณุงูˆูŠ P0 X

199
00:19:39,310 --> 00:19:47,370
ุชูƒูŠุจ ุฒูŠ P1 X ุชุฑุจูŠุน ูƒู„ู‡ ููŠ ุงู„ E ุฃุณ ุงุชู†ูŠู† XูŠุนู†ูŠ ุดูŠู„ุช

200
00:19:47,370 --> 00:19:51,030
ุงู„ S ูˆ ุญุทูŠุช ู…ูƒุงู† ุงุชู†ูŠู† ุตุงุฑุช X ุชุฑุจูŠุน ุถุฑุจุช ู‡ูˆูŠู† ููŠ

201
00:19:51,030 --> 00:19:55,090
ุงู„ู„ูŠ ุฌูˆุง ูุตุงุฑุช ุนู„ู‰ ุงู„ุดูƒู„ ุงู„ู„ูŠ ุนู†ุฏู†ุง ุจุฏุงุฎู„ ุงู„ู…ุนุงุฏู„ุฉ

202
00:19:55,090 --> 00:20:08,900
ุงู„ุชุงู„ุชุฉุงู„ู€ YP3 ุจุฏูŠ ุฃูƒุชุจ

203
00:20:08,900 --> 00:20:12,180
polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ cosine ุฒูŠ

204
00:20:12,180 --> 00:20:15,160
polynomial ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฃูˆู„ู‰ ููŠ ุงู„ู€ sine

205
00:20:18,960 --> 00:20:23,360
ูŠุจู‚ู‰ ุจุฏุฃ ูˆุงุฎุฏู†ุง ู‡ู†ุง ููŠ ุณูŠู‡ุงุช ูˆุงู„ุณูŠู‡ุงุช ู„ุฃ ูƒู…ุงู† ุจุฏูŠ

206
00:20:23,360 --> 00:20:28,860
ุงู‚ูˆู„ ุฏูŠ ุง ุจุฏูŠ ุงู‚ูˆู„ X to the power S ููŠ ุงู„ุฃูˆู„ X to

207
00:20:28,860 --> 00:20:34,700
the power S ููŠู‡ ุงู„ุขู† ุจุฏูŠ ุงู‚ูˆู„ ุฏูŠ ู†ุงุฏุฉ

208
00:20:37,040 --> 00:20:47,000
ูƒู„ ู‡ุฐุง ุงู„ูƒู„ุงู… ู…ุถุฑูˆุจ ููŠ cosine 2x ุฒุงุฆุฏ e node x

209
00:20:47,000 --> 00:20:53,980
ุฒุงุฆุฏ e1 ูƒู„ู‡ ู…ุถุฑูˆุจ ููŠ sin 2x ูˆ exponential ู…ุงุนู†ุฏูŠุด

210
00:20:56,240 --> 00:21:03,100
ู‡ู„ ุงูŠ term ู…ู† ุงู„ู…ุณุชุทูŠู„ ุงู„ู„ูŠ ููˆู‚ ู‡ุฐุง ูŠุดุจู‡ ุฃูŠ term

211
00:21:03,100 --> 00:21:07,720
ู…ู† ุงู„ู…ุณุชุทูŠู„ ุงู„ู„ูŠ ููˆู‚ ู‡ุฐุงุŸ ู„ุฃ ูˆู„ุง ููŠู‡ sign ูˆู„ุง ูƒูˆ

212
00:21:07,720 --> 00:21:08,120
ุณุงูŠู†

213
00:21:13,370 --> 00:21:20,650
ุงู„ู€ S ุจุฏู‡ุง ุชุณุงูˆูŠ 0 ูŠุจู‚ู‰ ุฃุตุจุญ YP3 ุจุฏู‡ุง ุชุณุงูˆูŠ D node

214
00:21:20,650 --> 00:21:32,590
X ุฒุงุฆุฏ D1 ููŠ Cos 2X ุฒุงุฆุฏ E node X ุฒุงุฆุฏ E1 ููŠ Sin

215
00:21:32,590 --> 00:21:38,120
2XูŠุจู‚ู‰ ุงู„ู€ Particular solution ุงู„ู„ูŠ ุจุฏู†ุง ูŠุง ุจู†ุงุช

216
00:21:38,120 --> 00:21:47,060
ูŠุจู‚ู‰ ูŠุณุงูˆูŠ YP1 ุฒุงุฆุฏ YP2 ุฒุงุฆุฏ YP3 ูŠุจู‚ู‰ ุฃุตุจุญ YP

217
00:21:47,060 --> 00:21:55,380
ูŠุณุงูˆูŠ YP1 ู‡ุงูŠ ูˆ ุจู†ุฒู„ู‡ ุฒูŠ ู…ุง ู‡ูˆ A0 X ุชุฑุจูŠุน A1X ุฒุงุฆุฏ

218
00:21:55,380 --> 00:21:57,580
A2 ุฒุงุฆุฏ

219
00:22:19,860 --> 00:22:21,260
YP2YP3YP4YP5YP6YP7

220
00:22:29,550 --> 00:22:36,330
ูŠุจู‚ู‰ ู‡ุฐุง ูƒู„ู‡ ูŠุนุชุจุฑ ู…ู† ุงู„ particular solution ุงู„ู„ูŠ

221
00:22:36,330 --> 00:22:41,990
ู…ุทู„ูˆุจ ุนู†ู‡ุง ุญุฏ ููŠูƒูˆุง ู„ุงูŠู‡ ุชุณุงุคู„ ู‡ู†ุง ููŠ ู‡ุฐุง ุงู„ุณุคุงู„ุŸ

222
00:22:41,990 --> 00:22:48,270
ููŠ ุงูŠ ุชุณุงุคู„ุŸุทูŠุจ ุนู„ู‰ ู‡ูŠูƒ ุงู†ุชู‡ู‰ ู‡ุฐุง ุงู„ section ูˆุฅู„ู‰

223
00:22:48,270 --> 00:22:55,590
ูŠูƒูˆู† ุฃุฑู‚ุงู… ุงู„ู…ุณุงุฆู„ ูŠุจู‚ู‰ exercises ุฎู…ุณุฉ ุณุจุนุฉ

224
00:22:55,590 --> 00:23:01,730
ุงู„ู…ุณุงุฆู„ ุงู„ุชุงู„ูŠุฉ ู…ู† ูˆุงุญุฏ ู„ุบุงูŠุฉ ุนุดุฑูŠู† ูˆู…ู† ุฎู…ุณุฉ

225
00:23:01,730 --> 00:23:08,730
ูˆุนุดุฑูŠู† ู„ุบุงูŠุฉ ุชู„ุงุชูŠู† ู…ุฑู†ูŠ

226
00:23:08,730 --> 00:23:13,530
ุฃุฏูŠูƒูŠ ู‚ุฏ ู…ุง ุชู‚ุฏุฑูŠ ุจุชุตูŠุฑ ู‡ุฐุง ุงู„ู…ูˆุถูˆุน ุจุตูŠุฑ ุฌุฏุง

227
00:23:26,290 --> 00:23:49,450
ุงู„ู„ูŠ ููˆู‚ ู‡ุฐุง ุงู†ุชู‡ูŠู†ุง ู…ู†ู‡ ุงุธู† ุฎู„ุงุตุŸ

228
00:23:49,450 --> 00:23:55,440
ุทูŠุจู„ู…ุง ู†ู†ุชู‚ู„ ุฅู„ู‰ ุงู„ section ุงู„ุฃุฎูŠุฑ ู…ู† ู‡ุฐุง ุงู„

229
00:23:55,440 --> 00:24:00,320
chapter ูˆู‡ูŠ ุงู„ุทุฑูŠู‚ุฉ ุงู„ุซุงู†ูŠุฉ ู…ู† ุทุฑู‚ ุญู„ ุงู„ non

230
00:24:00,320 --> 00:24:03,800
homogeneous differential equation ูˆู‡ูŠ ุทุฑูŠู‚ุฉ ุงู„

231
00:24:03,800 --> 00:24:11,280
variation of parameters ุชุบูŠูŠุฑ ุงู„ูˆุณูŠุทุงุช ูŠุจู‚ู‰ 85 ุฃูˆ

232
00:24:11,280 --> 00:24:19,340
58 ุงู„ู„ูŠ ู‡ูˆ variation of

233
00:24:20,530 --> 00:24:29,030
Parameters ู†ุณุชุฎุฏู…

234
00:24:29,030 --> 00:24:39,410
ู‡ุฐู‡ ุงู„ุทุฑูŠู‚ุฉ ู†ุณุชุฎุฏู… ู‡ุฐู‡ ุงู„ุทุฑูŠู‚ุฉ to find a

235
00:24:39,410 --> 00:24:45,850
particular solution to find a particular

236
00:24:54,020 --> 00:24:58,120
YP ุงู„ุฑู…ุฒ ู„ู„ุฅูŠู‚ุงุน

237
00:25:01,140 --> 00:25:07,280
Differential equation ู„ู„ู…ุนุงุฏู„ุฉ ุงู„ุชูุงุถู„ูŠุฉ a0 as a

238
00:25:07,280 --> 00:25:14,040
function of x ุฒุงุฆุฏ ุงู„ a1 as a function of x ู„ู„

239
00:25:14,040 --> 00:25:21,470
derivative n minus l1ุฒุงุฆุฏ ู†ุจู‚ู‰ ู…ุงุดูŠ ู„ุบุงูŠุฉ a n

240
00:25:21,470 --> 00:25:27,750
minus one as a function of x y prime ุฒุงุฆุฏ a n as a

241
00:25:27,750 --> 00:25:33,130
function of x ููŠ ุงู„ y ุจุฏู‡ ูŠุณุงูˆูŠ capital F of x

242
00:25:33,130 --> 00:25:36,790
ูˆู‡ุฐู‡ ุงู„ู„ูŠ ูƒู†ุง ุจู†ุทู„ู‚ ุนู„ูŠู‡ุง ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุฃุตู„ูŠุฉ ุงู„ู„ูŠ ู‡ูŠ

243
00:25:36,790 --> 00:25:46,210
starwhere ุญูŠุซ ุงู„ a node of x ูˆ ุงู„ a one of x ูˆ

244
00:25:46,210 --> 00:25:54,330
ู„ุบุงูŠุฉ ุงู„ a n of x ู‡ุฏูˆู„ ูƒู„ู‡ู… need not need not

245
00:25:54,330 --> 00:26:00,510
constants need

246
00:26:00,510 --> 00:26:09,410
not constants and no restrictionู…ุงุนู†ุฏูŠุด ู‚ูŠูˆุฏ

247
00:26:09,410 --> 00:26:24,010
ู…ุงุนู†ุฏูŠุด

248
00:26:24,010 --> 00:26:24,850
ู‚ูŠูˆุฏ ุนู„ูŠู‡ุง

249
00:26:33,720 --> 00:26:46,600
YC ูŠุจุฏูˆ ูŠุณุงูˆูŠ C1Y1 ุฒุงุฆุฏ C2Y2 ุฒุงุฆุฏ CNYN Assume that

250
00:26:46,600 --> 00:26:57,440
is a solution of the homo

251
00:27:10,960 --> 00:27:16,840
ุฒุงูŠุฏ ุฒุงูŠุฏ a n minus 1 as a function of x ููŠ ุงู„ y

252
00:27:16,840 --> 00:27:23,680
prime ุฒุงูŠุฏ a n of x y ุจุฏู‡ ูŠุณุงูˆูŠ ูƒุฏู‡ุŸ ุจุฏู‡ ูŠุณุงูˆูŠ 0

253
00:27:29,020 --> 00:27:32,880
to get a

254
00:27:32,880 --> 00:27:37,540
particular solution

255
00:27:37,540 --> 00:27:46,180
to get a particular solution yp of the

256
00:27:46,180 --> 00:27:56,140
differential equation star by the method

257
00:27:59,990 --> 00:28:07,590
of variation of

258
00:28:07,590 --> 00:28:20,570
parameters replace

259
00:28:20,570 --> 00:28:32,010
ุงุณุชุจุฏู„ replace the above constantsabove constants

260
00:28:32,010 --> 00:28:42,250
in

261
00:28:42,250 --> 00:28:48,930
the solution yc

262
00:28:48,930 --> 00:28:52,550
by the functions

263
00:28:55,020 --> 00:29:10,660
The functions C1 of X C2 of X ูˆ ู„ุบุงูŠุฉ CN of X That

264
00:29:10,660 --> 00:29:11,060
is

265
00:29:15,470 --> 00:29:25,490
YP ูŠุตุจุญ ุนู„ู‰ ุงู„ุดูƒู„ ุงู„ุชุงู„ูŠ C1 of XY1 C2 of XY2 ุฒุงุฆุฏ

266
00:29:25,490 --> 00:29:29,470
CN of XYN

267
00:29:35,370 --> 00:29:44,010
ุงู„ู€ CM as a function of X ูŠุณูˆูŠ ุชูƒุงู…ู„ ุงู„ูˆุฑู†ุณูƒูŠู† M

268
00:29:44,010 --> 00:29:51,350
as a function of X ููŠ capital F1 of X ุนู„ู‰

269
00:29:51,350 --> 00:29:59,090
ุงู„ูˆุฑู†ุณูƒูŠู† of X ูƒู„ู‡ ุจุงู„ู†ุณุจุฉ ุฅู„ู‰ DX ูˆุงู„ู€ M

270
00:30:02,270 --> 00:30:09,990
ูˆ ู„ุบุงูŠุฉ ุงู„ N ูˆ

271
00:30:09,990 --> 00:30:14,950
ู„ุบุงูŠุฉ

272
00:30:14,950 --> 00:30:21,750
ุงู„ N ูˆ ู„ุบุงูŠุฉ ุงู„ N ูˆ ู„ุบุงูŠุฉ ุงู„ N ูˆ ู„ุบุงูŠุฉ ุงู„ N

273
00:30:28,070 --> 00:30:34,350
is the determinant ุงู„ู…ุญุฏุฏ

274
00:30:34,350 --> 00:30:41,370
obtained from

275
00:30:41,370 --> 00:30:46,810
ุงู„ูˆุงู†ุณูƒูŠู†

276
00:30:46,810 --> 00:30:52,130
of X by replacing

277
00:30:58,290 --> 00:31:15,810
By replacing the M column By the column By

278
00:31:15,810 --> 00:31:26,730
the column Zero Zero ูˆู†ุธู„ ู…ุงุดูŠูŠู† ู„ุบุงูŠุฉ ุงู„ูˆุงุญุฏ and

279
00:31:30,230 --> 00:31:42,150
ุงู„ู€ F1 of X ุชุณุงูˆูŠ ุงู„ู€ F of X ู…ู‚ุณูˆู…ุฉ ุนู„ู‰ A0 of X

280
00:31:42,150 --> 00:31:45,550
Note

281
00:31:45,550 --> 00:31:50,310
When

282
00:31:50,310 --> 00:32:00,490
we use the method when weuse the method of

283
00:32:00,490 --> 00:32:05,590
variation

284
00:32:05,590 --> 00:32:15,910
of parameters ุนู†ุฏู…ุง

285
00:32:15,910 --> 00:32:23,110
ู†ุณุชุฎุฏู… ู‡ุฐู‡ ุงู„ุทุฑูŠู‚ุฉ variation of parameters the

286
00:32:23,110 --> 00:32:23,850
coefficient

287
00:32:33,870 --> 00:32:45,010
ูŠุฌุจ ุงู† ูŠูƒูˆู† ูŠูˆู…ูŠ ูŠูˆู…ูŠ

288
00:32:45,010 --> 00:32:47,290
ูŠูˆู…ูŠ ูŠูˆู…ูŠ ูŠูˆู…ูŠ ูŠูˆู…ูŠ ูŠูˆู…ูŠ ูŠูˆู…ูŠ ูŠูˆู…ูŠ

289
00:32:58,790 --> 00:33:11,670
is of the second order

290
00:33:11,670 --> 00:33:14,970
that

291
00:33:14,970 --> 00:33:18,690
is

292
00:33:20,880 --> 00:33:30,340
ุงู„ู€ a0 of x yw prime a1 of x y prime a2 of x y

293
00:33:30,340 --> 00:33:35,420
ุจุฏู‡ุง ุชุณุงูˆูŠ f

294
00:33:35,420 --> 00:33:50,710
of x and f y1 and y2 are two solutionsare two

295
00:33:50,710 --> 00:33:57,990
solutions of

296
00:33:57,990 --> 00:34:12,570
the homogeneous equation a0 of x yw prime a1 of x

297
00:34:12,570 --> 00:34:18,570
y prime a2 of x y ุจุฏูˆ ูŠุณุงูˆูŠ zero then

298
00:34:23,050 --> 00:34:33,070
ุงู„ู€ C1 of X ู‡ูˆ ุชูƒุงู…ู„ ู„ู†ุงู‚ุต Y2 as a function of X

299
00:34:33,070 --> 00:34:39,550
ููŠ ุงู„ู€ F1 of X ุนู„ู‰ ุฑูˆู†ุณูƒูŠู† X DX

300
00:34:43,770 --> 00:34:51,950
ุงู„ู€ C2 as a function of X ุจุฏู‡ ูŠุณุงูˆูŠ ุชูƒุงู…ู„ ู„ู…ูŠู†ุŸ

301
00:34:51,950 --> 00:34:58,690
ุจุฏู‡ ูŠุณุงูˆูŠ ุชูƒุงู…ู„ ู„ู„ู€ Y1 as a function of X ููŠ ุงู„ู€

302
00:34:58,690 --> 00:35:05,170
F1 of X ูƒู„ู‡ ุนู„ู‰ ุงู„ู€ run skin of X ููŠ ุงู„ู€ DX

303
00:35:05,170 --> 00:35:10,030
example

304
00:35:10,030 --> 00:35:10,490
1

305
00:35:15,200 --> 00:35:26,200
Find the general solution of

306
00:35:26,200 --> 00:35:32,340
the differential equation ู„ู„ู…ุนุงุฏู„ุฉ

307
00:35:32,340 --> 00:35:38,340
ุงู„ุชูุงุถู„ูŠุฉ YW'-2Y

308
00:35:43,090 --> 00:35:51,990
ู„ู„ู…ุนุงู…ู„ุฉ ุงู„ุชุญูˆูŠ ุนุถู„ูŠุฉ y

309
00:35:51,990 --> 00:36:03,650
triple prime ุฒุงุฆุฏ y prime ุจุฏูŠ ูŠุณุงูˆูŠ ุณูƒู„ x ุจูŠุณุงูˆูŠ

310
00:36:03,650 --> 00:36:12,610
ุณูƒู„ x ูˆู†ุงู‚ุต y ุนู„ู‰ 2 ุฃู‚ู„ ู…ู† x ุฃู‚ู„ ู…ู† y ุนู„ู‰ 2

311
00:37:01,140 --> 00:37:06,600
ุงู„ุทุฑูŠู‚ุฉ ุงู„ุซุงู†ูŠุฉ ู…ู† ุญู„ ุงู„ู…ุนุงุฏู„ุฉ ุงู„ุชูุงุถู„ูŠุฉ ุบูŠุฑ

312
00:37:06,600 --> 00:37:11,260
ุงู„ู…ุชุฌุงู†ุณุฉ ู‡ุฐู‡ ุงู„ุทุฑูŠู‚ุฉ ุณู…ู†ู‡ุง ุงู„ variation of

313
00:37:11,260 --> 00:37:14,940
parameters ูŠุจู‚ู‰ ุฃูˆู„ ุทุฑูŠู‚ุฉ ุทุฑูŠู‚ุฉ ุงู„ undetermined

314
00:37:14,940 --> 00:37:18,380
coefficients ูˆุงู„ุทุฑูŠู‚ุฉ ุงู„ุซุงู†ูŠุฉ ุงู„ุชูŠ ู‡ูŠ ุทุฑูŠู‚ุฉ ุงู„

315
00:37:18,380 --> 00:37:23,200
variation of parameters ุชุบูŠูŠุฑ ุงู„ูˆุณูŠุทุงุช ุชุชู„ุฎุต ู‡ุฐู‡

316
00:37:23,200 --> 00:37:26,740
ุงู„ุทุฑูŠู‚ุฉ ููŠู…ุง ูŠุฃุชูŠุทุจุนุง ุงู„ู€ Undetermined

317
00:37:26,740 --> 00:37:30,880
coefficients ู‚ู„ู†ุง ู…ุดุงู† ู†ุดุชุบู„ ุจู‡ุง ุจุฏู‘ูŠ ุดุฑุทูŠู† ุงู†

318
00:37:30,880 --> 00:37:34,860
ุงู„ู…ุนุงู…ู„ุฉ ุชุซูˆุงุจุช ูˆ ุงู„ F of X ุชุจู‚ู‰ ุนู„ู‰ ุดูƒู„ ู…ุนูŠู† ุญุณุจ

319
00:37:34,860 --> 00:37:37,660
ุงู„ุฌุฏูˆู„ ุงู„ู„ูŠ ุงุนุทุงู†ุงูƒูˆุง ูŠุนู†ู‰ุŒ ู…ุธุจูˆุทุŸ ู‡ู†ุง ุงู„

320
00:37:37,660 --> 00:37:41,460
variation ุจูŠู‚ูˆู„ูŠ ู„ุฃ ุงู„ู…ุนุงู…ู„ุฉ ุชุซูˆุงุจุช ูˆ ุงู„ู„ู‡ ู…ุชุบูŠุฑุฉ

321
00:37:41,460 --> 00:37:45,660
ู…ุงุนู†ุฏูŠุด ู…ุดูƒู„ุฉ ุงู„ F of X ุงู„ู„ูŠ ููŠ ุงู„ุทุฑู ุงู„ูŠู…ูŠู† ู‡ุฐู‡

322
00:37:45,660 --> 00:37:49,180
ุงู„ F of X ูƒุงู†ุช ุนู„ู‰ ุดูƒู„ ู…ุนูŠู† ูˆ ุงู„ู„ู‡ ุบูŠุฑ ุนู„ูŠู‡ุง ุดูƒู„

323
00:37:49,180 --> 00:37:53,590
ู…ุนูŠู† ู…ุงุนู†ุฏูŠุด ู…ุดูƒู„ุฉูŠุนู†ูŠ ุฃูŠุด ู…ุง ูŠูƒูˆู† ุดูƒู„ ุงู„ F ูŠูƒูˆู† ูˆ

324
00:37:53,590 --> 00:37:56,590
ุฃูŠุด ู…ุง ูŠูƒูˆู† ุงู„ู…ุนุงู…ู„ุฉ ุซูˆุฉ ุจุทูˆู„ุฉ ู…ุชุบูŠุฑุงุช ู…ุงุนู†ุฏูŠุด

325
00:37:56,590 --> 00:38:00,970
ู…ุดูƒู„ุฉ ูŠุจู‚ู‰ ู‡ุฐุง ุงู„ุดูƒู„ ุงู„ุนุงู…ู„ ุงู„ู…ุนุงุฏู„ ุฃุณุทุงุฑ ุญูŠุซ ู‡ุฏูˆู„

326
00:38:00,970 --> 00:38:05,350
ุงู„ุฏูˆู„ ู†ูŠุฉ not ูƒู†ุตุฉ ู„ูŠุณ ุจุงู„ุถุฑูˆุฑุฉ ูŠูƒูˆู†ูˆุง ูƒู†ุตุฉ ูŠุนู†ูŠ

327
00:38:05,350 --> 00:38:08,470
ู…ู…ูƒู† ูŠูƒูˆู†ูˆุง ูƒู†ุตุฉ ูˆ ู…ู…ูƒู† ูŠูƒูˆู†ูˆุง ู…ุชุบูŠุฑุงุช ู…ุงุนู†ุฏูŠุด

328
00:38:08,470 --> 00:38:12,070
ู…ุดูƒู„ุฉ ููŠ ู‡ุฐู‡ ุงู„ุนุงู„ู… and

329
00:38:13,430 --> 00:38:18,250
and no restrictions

330
00:38:18,250 --> 00:38:23,170
ู…ุงุนู†ุฏูŠุด ู‚ูŠูˆุฏ ุนู„ู‰ ุดูƒู„ ุงู„ F of X ููŠ ุงู„ Undetermined

331
00:38:23,170 --> 00:38:25,650
ู‚ู„ุช ูŠุงุจูˆู„ูˆู†ูˆู…ูŠู„ ูŠุงุจูˆู„ูˆู†ูˆู…ูŠู„ ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด

332
00:38:25,650 --> 00:38:28,830
ูŠุงุจูˆู„ูˆู†ูˆู…ูŠู„ ููŠ ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

333
00:38:28,830 --> 00:38:33,850
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

334
00:38:33,850 --> 00:38:35,710
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

335
00:38:35,710 --> 00:38:36,610
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

336
00:38:36,610 --> 00:38:37,770
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

337
00:38:37,770 --> 00:38:38,170
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

338
00:38:38,170 --> 00:38:40,250
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ

339
00:38:40,250 --> 00:38:45,310
ุงู„ุงูƒุณุจูˆู†ูŠู†ุด ููŠ ุงู„ุงูƒุณู‡ุฐุง ุงู„ุดุบู„ ุงู„ูˆุญูŠุฏ ุงู„ู„ูŠ ู‡ูˆ ุงู„ุญู„

340
00:38:45,310 --> 00:38:47,610
ุงู„ู€Complementary Solution ุจุฏูŠ ุฃุฏูˆุฑ ุนู„ู‰ ุงู„ู€

341
00:38:47,610 --> 00:38:51,270
Particular Solution ุชุจุน ุงู„ู…ุนุงุฏู„ุฉ ู…ูŠู†ุŸ ุชุจุน ุงู„ู…ุนุงุฏู„ุฉ

342
00:38:51,270 --> 00:38:55,570
Star ูุจุฌูŠ ุจู‚ูˆู„ ุจุฏูŠ ุฃูุชุฑุถ ุงู„ุญู„ ุจุทุฑูŠู‚ุฉ ุงู„ version of

343
00:38:55,570 --> 00:38:59,870
parameters ู‡ูˆ ู†ูุณ ุงู„ุญู„ ู‡ุฐุง ุจุณ ุจุฏูŠ ุฃุดูŠู„ู‡ ุซูˆุงุจุช ูˆ

344
00:38:59,870 --> 00:39:04,230
ุฃุถุน ุจุฏู„ู‡ู… ุฏูˆุงู„ ููŠ X ูŠุจู‚ู‰ Star ุดูƒู„ ุงู„ Particular

345
00:39:04,230 --> 00:39:09,490
Solution ู‡ูˆ C1 of X Y1 ุฒุงุฆุฏ C2 of X Y2 ุฒุงุฆุฏ ุฒุงุฆุฏ

346
00:39:09,490 --> 00:39:14,560
CN ูˆA of X YNุทูŠุจ ู…ูŠู† ู‡ูŠ ุงู„ู€C ู‡ุงุช ูƒูŠู ุจุฏู‰ ุฃุญุณุจู‡ุง

347
00:39:14,560 --> 00:39:19,980
ู‡ุฐู‡ุŸ ุจุนุฏ ุดูˆูŠุฉ ุญุณุงุจุงุช ู„ุฌูŠู†ุง ููŠ ู‚ุงุนุฏุฉ ุจูˆุงุณุทุชู‡ุง ุจุฌูŠุจ

348
00:39:19,980 --> 00:39:25,320
ูƒู„ ุฏุงู„ุฉ ู…ู† ู‡ุฐู‡ ุงู„ุฏูˆู„ุฉ ู…ูŠู† ู‡ูŠุŸ ู‚ุงุนุฏุฉ CM of XM ุทุจุนุง

349
00:39:25,320 --> 00:39:29,500
ุจูˆุงุญุฏ ูˆุงุซู†ูŠู† ู„ุบุงูŠุฉ ุงู„ N ูŠุนู†ูŠ ุจC ูˆุงุญุฏ ูˆC ุงุชู†ูŠู† ูˆC

350
00:39:29,500 --> 00:39:34,890
ุชู„ุงุชุฉ ูƒุฏู‡ ุงู„ุงุฎุฑูŠู†ูŠุณุงูˆูŠ ุงู„ู€ Ronschen M F1 of X ุนู„ู‰

351
00:39:34,890 --> 00:39:38,530
Ronschen of X DX ู†ุฌูŠ ุนู„ู‰ ุงู„ู€ Ronschen of X ุงู„ู€

352
00:39:38,530 --> 00:39:42,330
Ronschen ู‡ุฐุง ุงู„ุชุงุจุน ุงู„ุญู„ูˆู„ ุงู„ู„ูŠ ููŠ ุงู„ุญุงู„ุฉ ุงู„ุฃูˆู„ู‰

353
00:39:42,330 --> 00:39:46,190
Y1 ูˆ Y2 ูˆ YN ุจุฌูŠุจ ุงู„ู„ูŠ ู‡ู… ุงู„ู€ Ronschen ุจูŠูƒูˆู† ู‡ุฐุง

354
00:39:46,190 --> 00:39:50,140
ู‡ูˆ ุงู„ู€ Ronschen ุชุจุน ุญุตูˆู ุนู„ู‰ ุดุฌุฑุฉุจุฏูŠ ุฑูˆู†ุณูƒูŠู† 1 ูˆ

355
00:39:50,140 --> 00:39:54,760
ุฑูˆู†ุณูƒูŠู† 2 ูˆ ุฑูˆู†ุณูƒูŠู† 3 ู„ุบุงูŠุฉ ุฑูˆู†ุณูƒูŠู† N ู…ูŠู† ู‡ูˆ ู‡ุฐุงุŸ

356
00:39:54,760 --> 00:39:58,720
ู‡ุฐุง ุงู„ ุฑูˆู†ุณูƒูŠู† 1 ุจุงุฌูŠ ุนู„ู‰ ุงู„ ุฑูˆู†ุณูƒูŠู† ู† ุฏูŠ ุจุดูŠู„

357
00:39:58,720 --> 00:40:02,880
ุงู„ุนู…ูˆุฏ ุงู„ุฃูˆู„ ูˆ ุจุญุท ุจุฏุงู„ู‡ ุงู„ุนู…ูˆุฏ ู‡ุฐุง ูˆ ุจุญุณุจ ู‚ุฏุงุด

358
00:40:02,880 --> 00:40:07,890
ู‚ูŠู…ุฉ ุงู„ ุฑูˆู†ุณูƒูŠู† ุทุจ ุจุฏูŠ ุฑูˆู†ุณูƒูŠู† 2ุจุณูŠุจ ุงู„ุฑูˆู†ุณูƒูŠู† ู‡ุฐุง

359
00:40:07,890 --> 00:40:13,670
ุฒูŠ ู…ุง ู‡ูˆ ูˆ ุจุฌูŠ ุนู„ู‰ ุงู„ุนู…ูˆุฏ ุงู„ุซุงู†ูŠ ุจุดูŠู„ู‡ ูƒู„ู‡ ูˆ ุจุญุท

360
00:40:13,670 --> 00:40:16,810
ุจุฏุงู„ู‡ ุงู„ุนู…ูˆุฏ ู‡ุฐุง ูˆ ู‡ูƒุฐุง ุงู„ุฑูˆู†ุณูƒูŠู† ุซู„ุงุซุฉ ุฑูˆู†ุณูƒูŠู†

361
00:40:16,810 --> 00:40:21,210
ู„ุบุงูŠุฉ ุจูƒู…ู„ู‡ู… ูƒู„ู‡ู… ูŠุจู‚ู‰ ููŠ ู‡ุฐู‡ ุงู„ุญุงู„ุฉ ุฌุจุชู‡ุง ุทุจ ู…ูŠู†

362
00:40:21,210 --> 00:40:25,850
ู‡ูŠ ุงู„ F1 ู‡ุฐู‡ุŸ ุงู‡ ุงู„ F1 ู‡ุฐู‡ ู„ู…ุง ุชูŠุฌูŠ ุงู„ู…ุนุงุฏู„ุฉ ุจุฏ

363
00:40:25,850 --> 00:40:30,310
ุงู„ู…ุนุงุฏู„ุฉ ู‡ู†ุง ุงู„ู…ุนุงู…ู„ ุชุจุนูŠ ูŠูƒูˆู† ุฌุฏูŠุดู‡ุฐุง ูŠุนู†ูŠ ุฃู†ู†ูŠ

364
00:40:30,310 --> 00:40:36,110
ุฃุฌุณู… ุงู„ุทุฑููŠู† ุนู„ู‰ ู…ูŠู† ุนู„ู‰ a node of x ูŠุจู‚ู‰ ุงู„ F1 ู‡ูŠ

365
00:40:36,110 --> 00:40:42,270
ุนุจุงุฑุฉ ุนู† Fx ู…ู‚ุณูˆู…ุฉ ุนู„ู‰ ุงู„ a node of x ูŠุจู‚ู‰ ุงู„ F1

366
00:40:42,270 --> 00:40:47,270
of x ู‡ูŠ ุงู„ F of x ู…ู‚ุณูˆู…ุฉ ุนู„ู‰ ู…ูŠู† ุนู„ู‰ ุงู„ a node of

367
00:40:47,270 --> 00:40:52,490
x ุฃุตู„ุง ูˆุงุถุญ ูƒู„ุงู… ู‡ุฐุง ุทูŠุจ ุงู„ุขู† ููŠ ู…ู„ุงุญุธุฉ ุจุฏู†ุง ู†ุดูŠุฑ

368
00:40:52,490 --> 00:40:57,290
ุฅู„ูŠู‡ุง ุงู„ู…ู„ุงุญุธุฉ ูƒุงู†ุช ุชุงู„ูŠุฉู‚ู„ุชู‡ุง ุจุณ ุจุฏู†ุง ู†ุนูŠุฏู‡ุง ู‡ูŠุง

369
00:40:57,290 --> 00:41:00,590
ุนู†ุฏู…ุง ู†ุณุชุฎุฏู… ุงู„ variation of parameters ู„ุงุฒู… ูŠูƒูˆู†

370
00:41:00,590 --> 00:41:05,610
ุงู„ู…ุนุงู…ู„ ุชุจุน Y ุงู† ู‡ูˆ ู…ูŠู† ูˆ ุงู†ุณูŠุช ูˆ ุญุทูŠุช ุงู„ F of X

371
00:41:05,610 --> 00:41:11,110
ู‡ุฐู‡ ุจุฏู„ ู‡ุฐู‡ ุจุตูŠูƒ ูƒู„ุงู…ูƒ ุบู„ุท ุจุตูŠูƒ ุชุญู‚ู‚ุด ูˆ ู…ุงุชู‚ุฏุฑุด

372
00:41:11,110 --> 00:41:16,250
ุชุชูƒุงู…ู„ูŠ ุชู…ุงู… ูŠุจู‚ู‰ ุชุชุฃูƒุฏูŠ ุนู†ุฏู…ุง ุจุฏูƒ ุชุณุชุฎุฏู… ุงู„ุชูƒุงู…ู„

373
00:41:16,250 --> 00:41:20,390
ุจุชุฎู„ูŠ ุงู„ู…ุนุงู…ู„ ุชุจุน Y to the derivative ุงู† ู‡ูˆ ูˆุงุญุฏ

374
00:41:20,390 --> 00:41:24,610
ุตุญูŠุญ ุชู…ุงู… ู‡ูŠ ู‚ุทุจุฉ ุงู„ุฃูˆู„ู‰ ุจุนุฏูŠู† ููŠู†ุง ู…ู„ุงุญุธุฉ ุชุงู†ูŠุฉ

375
00:41:25,260 --> 00:41:28,720
ุจูŠู‚ูˆู„ ุงู„ equation star ู‡ุฐู‡ ู„ูˆ ูƒุงู†ุช ู…ู† ุงู„ุฑุชุจุฉ

376
00:41:28,720 --> 00:41:32,680
ุงู„ุซุงู†ูŠุฉ ูŠุจู‚ู‰ ุจุฏู„ ุงู„ุฑูˆู†ุณูƒูŠู† 1 ูˆ ู†ุต ูƒู†ุชูˆุง ู…ุญุณุจุฉ ูˆ

377
00:41:32,680 --> 00:41:38,320
ุฎุงู„ุตุฉ ูˆ ุฌุงู‡ุฒุฉ ุงูŠุดูŠ ุจูŠู‚ูˆู„ ุงู„ C 1 of X ุจุชุญุท ู„ู„ุญู„

378
00:41:38,320 --> 00:41:42,940
ุงู„ุชุงู†ูŠ ุจุฅุดุงุฑุฉ ุณุงู„ุจ ููŠ ุงู„ F 1 of X ุนู„ู‰ ุงู„ุฑูˆู†ุณูƒูŠู† of

379
00:41:42,940 --> 00:41:48,260
X ุทูŠุจ ูˆ ุงู„ C2ุŸ ูˆ ุงู„ C2 ู‡ูŠ ุงู„ุญู„ ุงู„ุฃูˆู„ ููŠ ุงู„ 1 of X

380
00:41:48,260 --> 00:41:51,850
ุนู„ู‰ ู…ูŠู†ุŸ ุนู„ู‰ ุงู„ W of XูŠุจู‚ู‰ ูƒู…ุงู† ู„ุงุจุฏ ุชุญุณุจ

381
00:41:51,850 --> 00:41:54,950
ุงู„ู‡ูŠุฑูˆู†ูŠุณูƒูˆ ู„ุฃ ู‡ุฐุง ุฅู† ูƒุงู†ุช ู…ู† ุงู„ุฑุชุจุฉ ุงู„ุซุงู†ูŠุฉุŒ ู…ู†

382
00:41:54,950 --> 00:41:59,930
ุงู„ุฑุชุจุฉ ุงู„ุชุงู„ุชุฉุŒ ุจุฏูŠ ุฃุฑุฌุน ุนุงู„ู…ูŠุง ู„ู„ูƒู„ุงู… ุงู„ุฃูˆู„ุŒ ูˆุงุถุญ

383
00:41:59,930 --> 00:42:03,590
ูƒู„ุงู… ู‡ูŠูƒุŸ ุงู„ุฃู…ู† ุงู„ู„ูŠ ุญุทูˆู‡ ุนู„ู‰ ุฃุฑุถ ูˆุงู‚ุนุฉ ุฌุงู„ูŠ ูŠุญู„

384
00:42:03,590 --> 00:42:08,430
ุงู„ู…ุนุงุฏู„ุฉ ู‡ุฐู‡ุจู‚ูˆู„ู‡ ุชู…ุงู… ูŠุจู‚ู‰ ุงู†ุง ุจุฏูŠ ุงุจุฏุง ุจุญู„ ุงู„

385
00:42:08,430 --> 00:42:12,190
homogenous differential equation ูƒู…ุง ูƒู†ุง ู…ู† ู‚ุจู„

386
00:42:12,190 --> 00:42:19,470
ูŠุจู‚ู‰ ุจุงุฌูŠ ุจู‚ูˆู„ู‡ ู‡ู†ุง let Y ุชุณุงูˆูŠ E ุฃูุณ RX ุจูŠู‡

387
00:42:19,470 --> 00:42:21,090
solution

388
00:42:27,760 --> 00:42:36,620
ูŠุจู‚ู‰ ู‡ู†ุง the characteristic equation is R ุชูƒุนูŠุจ

389
00:42:36,620 --> 00:42:42,820
ุฒุงุฆุฏ R ูŠุณุงูˆูŠ 0ูŠุจู‚ู‰ R ููŠ R ุชุฑุจูŠุน ุฒุงุฆุฏ ูˆุงุญุฏ ุจุฏู‡

390
00:42:42,820 --> 00:42:49,640
ูŠุณุงูˆูŠ Zero ูŠุจู‚ู‰ R ุชุณุงูˆูŠ Zero ูˆR ุชุณุงูˆูŠ ุฒุงุฆุฏ ุงูˆ ู†ุงู‚ุต

391
00:42:49,640 --> 00:42:54,680
I ูŠุจู‚ู‰ ุจู†ุงุก ุนู„ูŠู‡ ุจู‚ูˆู„ู‡ ุงู„ complementary solution

392
00:42:54,680 --> 00:43:06,080
YC ุจุฏู‡ ูŠุณุงูˆูŠ C ูˆุงุญุฏ ููŠ ุงู„ E ุงูˆ Zeroุฒุงุฆุฏ C2 Cos X

393
00:43:06,080 --> 00:43:12,420
ุฒุงุฆุฏ C3 Sin X ู„ุฃู†ู‡ ุฒุงุฏุฉ ูˆู†ู‚ุต I ุงู„ A ุจุงู„ุฒูŠุฑูˆ ูˆุงู„B

394
00:43:12,420 --> 00:43:18,860
ุจุงู„ู…ูŠู† ุจูˆุงุญุฏ ูŠุจู‚ู‰ ู‡ุฐุง ุงู„ุดูƒู„ ุงู„ู…ุนุงุฏู„ุฉ

395
00:43:18,860 --> 00:43:24,210
ุงู„ุฃุตู„ูŠุฉ ุจู†ุงุชู‡ุง ุฏูŠ ุณู…ูŠู‡ุง ุงู„ starุงู„ุงู† ุงู†ุง ุจุฏูŠ ุงูƒุชุจ

396
00:43:24,210 --> 00:43:30,330
ุดูƒู„ ุงู„ particular solution ู„ู„ู…ุนุงุฏู„ุฉ star ูˆ ู„ุงุญุธูŠ

397
00:43:30,330 --> 00:43:34,890
ุงู† ุงู„ู…ุนุงู…ู„ ุชุจุน ุงู„ู…ุดุชู‚ุฉ ุงู„ุฃูˆู„ู‰ ู‡ูˆ ูˆุงุญุฏ ุตุญูŠุญ ุงู„ู…ุฑุฉ

398
00:43:34,890 --> 00:43:39,210
ู‡ุฐู‡ ูŠุนู†ูŠ ู„ุง ููŠ ู„ู ูˆู„ุง ุฏูˆุฑ ุนู† ุงู„ุดุบู„ ู…ุจุงุดุฑ ููŠ ู‡ุฐุง

399
00:43:39,210 --> 00:43:47,730
ุงู„ุณุคุงู„ ูŠุจู‚ู‰ ุจุงุฌูŠ ุจู‚ูˆู„ู‡ the particular solution

400
00:43:47,730 --> 00:43:50,430
of

401
00:44:02,410 --> 00:44:12,710
ูŠุจู‚ู‰ C1 of X ุฒุงุฆุฏ C2 of X ููŠ Cos X ุฒุงุฆุฏ C3 of X ููŠ

402
00:44:12,710 --> 00:44:20,090
Sin Xุจุนุฏ ู‡ูŠูƒ ุจุชุฑูˆุญ ุงุฌูŠุจ ุงู„ุฑูˆู†ุณูƒูŠู† ูŠุจู‚ู‰ ู‡ุฐุง

403
00:44:20,090 --> 00:44:25,810
ุงู„ุฑูˆู†ุณูƒูŠู† as a function of x ู„ู…ูŠู† ุงู„ุฑูˆู†ุณูƒูŠู† ู„ู„ุญู„ูˆู„

404
00:44:25,810 --> 00:44:31,670
ุงู„ุชู„ุงุชุฉ ุงู„ุญู„ ุงู„ุฃูˆู„ ู‚ุฏุงุด ู‡ู†ุง ุจู†ุงุช ูˆุงุญุฏ ูˆุงู„ุญู„ ุงู„ุชุงู†ูŠ

405
00:44:31,670 --> 00:44:36,690
cosine ุงู„ X ูˆุงู„ุญู„ ุงู„ุชุงู„ุช sin X ูŠุจู‚ู‰ ู‡ูŠ ุซู„ุงุซุฉ ุญู„ูˆู„

406
00:44:36,690 --> 00:44:43,960
ูŠุจู‚ู‰ ู‡ูŠ ูˆุงุญุฏ ูˆุงู„ุชุงู†ูŠ cosine ุงู„ X ูˆุงู„ุชุงู„ุช sin XูŠุจู‚ู‰

407
00:44:43,960 --> 00:44:50,280
ุงู„ู…ุดุชู‚ุฉ Zero ุงู„ู…ุดุชู‚ุฉ ุณุงู„ุจ Sine X ุงู„ู…ุดุชู‚ุฉ Cos X

408
00:44:50,280 --> 00:44:58,140
ูƒู…ุงู† ู…ุฑุฉ Zero ู†ุงู‚ุต Cos X ู†ุงู‚ุต Sine X ุจุฏูŠ ุงููƒู‡

409
00:44:58,140 --> 00:45:05,170
ุจุงุณุชุฎุฏุงู… ุนู†ุงุตุฑ ุงู„ุนู…ูˆุฏ ุงู„ุฃูˆู„ูŠุจู‚ู‰ ูˆุงุญุฏ ููŠู‡ ู‚ุดุท ุจุตูู‡

410
00:45:05,170 --> 00:45:11,630
ุนู…ูˆุฏู‡ ูŠุจู‚ู‰ sin ุชุฑุจูŠุน ุงู„ X ุฒุงุฆุฏ cosine ุชุฑุจูŠุน ุงู„ X

411
00:45:11,630 --> 00:45:16,650
ุงู„ู„ูŠ ู‡ูˆ ู‚ุฏุงุดุฑ ุงู„ูˆุงุญุฏ ุจุฏูŠ ุฃุฌูŠุจ ุงู„ุฑูˆู†ุณ ูƒูŠู† ูˆุงู† as a

412
00:45:16,650 --> 00:45:20,810
function of X ุจุฏูŠ ุฃุดูŠู„ ุงู„ุนู…ูˆุฏ ู‡ุฐุง ูˆ ุฃุณุชุจุฏู„ู‡

413
00:45:20,810 --> 00:45:31,390
ุจุงู„ุนู…ูˆุฏ 001ูˆุงู„ุงุชู†ูŠู† ู‡ุฏูˆู„ ุฒูŠ ู…ุง ู‡ู… cos x sin x-sin

414
00:45:31,390 --> 00:45:41,050
x cos x-cos x-sin x ูˆูŠุณุงูˆูŠุจูŠุฏููƒู‡ ุจุฑุถู‡ ุจุงุณุชุฎุฏุงู…

415
00:45:41,050 --> 00:45:46,830
ุงู„ุนู…ูˆุฏ ุงู„ุฃูˆู„ ูŠุจู‚ู‰ zero ู†ุงู‚ุต zero ุฒุงุฆุฏ ูˆุงุญุฏ ููŠ ุฃุดุท

416
00:45:46,830 --> 00:45:51,250
ุจุตูู‡ ุนู…ูˆุฏู‡ cosine ุชุฑุจูŠู‡ ุฒุงุฆุฏ sine ุชุฑุจูŠู‡ cosine

417
00:45:51,250 --> 00:45:57,430
ุชุฑุจูŠู‡ ุงู„ X ุฒุงุฆุฏ sine ุชุฑุจูŠู‡ ุงู„ X ูƒู„ู‡ ุจู‚ุฏุงุด ุจูˆุงุญุฏ

418
00:45:57,910 --> 00:46:02,810
ูŠุจู‚ู‰ ุจู†ุงุก ุนู„ูŠู‡ ุจุฏูŠ ุงุฌูŠุจ ุงู„ุฑูˆู†ุณูƒู† ุงุชู†ูŠู† as a

419
00:46:02,810 --> 00:46:05,910
function of x ูŠุจู‚ู‰ ุงู„ุนู…ูˆุฏูŠ ุงู„ู„ูŠ ุงู„ู„ูŠ ู‡ูˆ ุจุฏูŠ ุงุฑุฌุน

420
00:46:05,910 --> 00:46:09,970
ูƒู…ุง ูƒุงู† ูŠุง ุจู†ุงุช ุงูŠ ูˆุงุญุฏ zero zero ุงู„ุนู…ูˆุฏูŠ ุงู„ุชุงู†ูŠ

421
00:46:09,970 --> 00:46:13,550
ู‡ูˆ ุงู„ู„ูŠ ุจุฏูŠ ุงุณุชุจุฏู„ู‡ ุจ zero zero ูˆุงุญุฏ ูˆุงู„ุนู…ูˆุฏูŠ

422
00:46:13,550 --> 00:46:20,110
ุงู„ุชุงู„ุช ูƒู…ุง ูƒุงู† sine ุงู„ X cosine ุงู„ X ู†ุงู‚ุต sine ุงู„

423
00:46:20,110 --> 00:46:25,970
XูŠุจู‚ู‰ ุจู†ุงุก ุนู„ูŠู‡ ู‡ุฐุง ุงู„ูƒู„ุงู… ูŠุณุงูˆูŠ ุจุฏุง ููƒู‡ ุจุงุณุชุฎุฏุงู…

424
00:46:25,970 --> 00:46:31,590
ุนู†ุงุตุฑ ุงู„ุนู…ูˆุฏ ุงู„ุฃูˆู„ ูŠุจู‚ู‰ ูˆุดุท ุจุตูู‡ ูˆุนู…ูˆุฏู‡ zero ู†ุงู‚ุต

425
00:46:31,590 --> 00:46:36,470
cosine ุงู„ X ูŠุจู‚ู‰ ู†ุงู‚ุต cosine ุงู„ X ุฎู„ูŠู†ุง ู†ุฌูŠุจ

426
00:46:36,470 --> 00:46:43,350
ุงู„ุฑูˆู†ุณูƒู†ูŠ 3 as a function of X ูŠุณุงูˆูŠ 1 0 0 ุงู„ุนู…ูˆุฏ

427
00:46:43,350 --> 00:46:50,590
ุงู„ุชุงู†ูŠ ูƒู…ุง ู‡ูˆ cosine ุงู„ X ู†ุงู‚ุต sine ุงู„ Xูˆู‡ู†ุง ู†ุงู‚ุต

428
00:46:50,590 --> 00:46:58,270
cosine ุงู„ X ูˆู‡ู†ุง 001 ุจุงู„ุดูƒู„ ุงู„ู„ูŠ ุงู‚ู†ุนู†ุงู‡ ุจุฏุง ุงููƒู‡

429
00:46:58,270 --> 00:47:02,590
ุจุงุณุชุฎุฏุงู… ุนู†ุงุตุฑ ุงู„ุนู…ูˆุฏ ุงู„ุฃูˆู„ ุจุฌูˆุดุท ุจุตู ูˆ ุนู…ูˆุฏู‡ ู†ุงู‚ุต

430
00:47:02,590 --> 00:47:11,780
sin Xุฎู„ู‘ุตู†ุง ู…ู†ู‡ุŒ ุณุฃุญุตู„ ุนู„ู‰ ุงู„ู€ C1 as a function of

431
00:47:11,780 --> 00:47:19,880
X ุงู„ุชูƒุงู…ู„ ู…ู† ุฃูŠู†ุŸ ุงู„ุชูƒุงู…ู„ ู„ู„ู€ Ronskin 1 of X ููŠ

432
00:47:19,880 --> 00:47:24,260
ุงู„ู€ F of X ู„ุง ูŠูˆุฌุฏ ููŠู‡ุง ุชุบูŠูŠุฑ ูƒู…ุง ู‡ูŠ ุนู„ู‰ ุงู„ู€

433
00:47:24,260 --> 00:47:30,180
Ronskin of X ูƒู„ู‡ ุจุงู„ู†ุณุจุฉ ุฅู„ู‰ DX ูŠุณูˆู‰ ุชูƒุงู…ู„ Ronskin

434
00:47:30,180 --> 00:47:35,670
1 ุทู„ุนู†ุงู‡ ุจู‚ุฏุฑุด ุจูˆุงุญุฏูŠุจู‚ู‰ ู‡ุฐุง ูˆุงุญุฏ ููŠู‡ ุงู„ F of X

435
00:47:35,670 --> 00:47:41,410
ุงู„ู„ูŠ ูŠุจู‚ู‰ ุฏู‡ุดุฉ ุจู†ุงุช ุณูƒ ุงู„ X ุงุฒุงูŠู† ุนู„ู‰ ุณูƒ ุงู„ X ุนู„ู‰

436
00:47:41,410 --> 00:47:47,270
ุงู„ุฑูˆู†ุณูƒูŠู† of X ุงู„ุฃูˆู„ ุจุฑุถู‡ ูˆุงุญุฏ ูƒู„ู‡ DX ูŠุจู‚ู‰ ุชูƒุงู…ู„

437
00:47:47,270 --> 00:47:53,190
ุงู„ุณูƒ ู„ูŠู† absolute value ู„ุณูƒ ุงู„ X ุฒุงุฆุฏ ุชุงู†ูŠ ุงู„ X

438
00:47:53,190 --> 00:47:59,710
ุจุฏู†ุง ู†ุฌูŠุจ C2 as a function of XูŠุจู‚ู‰ ุชูƒุงู…ู„ ุฑู†ุณูƒูŠู† 2

439
00:47:59,710 --> 00:48:06,470
of x ูู‰ f of x ุนู„ู‰ ุฑู†ุณูƒูŠู† of x dx ูŠุณูˆู‰ ุชูƒุงู…ู„

440
00:48:06,470 --> 00:48:11,790
ุฑู†ุณูƒูŠู† 2 ู‡ูˆ ุจู†ุงู‚ุต cos x

441
00:48:22,510 --> 00:48:28,490
ูŠุจู‚ู‰ ุชูƒุงู…ู„ ู„ู†ุงู‚ุต DX ูŠุจู‚ู‰ ุจู†ุงู‚ุต X ูˆ ู„ุง ุชูƒุชุจูŠ

442
00:48:28,490 --> 00:48:33,650
Constants ู„ุฃู† ูƒู„ ุตู„ุงุฉ ูˆ ูƒุชุงุจ ูŠุนู…ู„ูˆุง ู„ูŠู‡ ุชูƒุฑุงุฑ ูŠุจู‚ู‰

443
00:48:33,650 --> 00:48:38,510
ุณูŠุจูŠู† ู…ู† ุงู„ุชูƒุฑุงุฑ ูŠุจู‚ู‰ ุจูƒุชุจู‡ุง ูู‚ุท ุฒูŠ ู‡ูŠูƒ ุจุฏุฃ ูŠุงุฎุฏ

444
00:48:38,510 --> 00:48:39,590
C3

445
00:48:46,760 --> 00:48:54,240
ูŠุจู‚ู‰ ุจูŠุฏูŠ C3A of X ูŠุจู‚ู‰ ูŠุณุงูˆูŠ ุชูƒุงู…ู„ ุฑูˆู†ุณูƒูŠู† 3 of X

446
00:48:54,240 --> 00:49:00,900
ููŠ F of X ุนู„ู‰ ุฑูˆู†ุณูƒูŠู† of X DX Y ูŠุณุงูˆูŠ ุงู„ุฑูˆู†ุณูƒูŠู† 3

447
00:49:00,900 --> 00:49:09,010
ู„ู‡ ุณุงู„ุจ ุตูŠู† Xูˆุงู„ุฏุงู„ุฉ ุณูƒ ุงู„ X ูˆุงู„ุฑู…ุฒ ูƒุงู† ูˆุงุญุฏ DX

448
00:49:09,010 --> 00:49:15,810
ูŠุจู‚ู‰ ูŠุณุงูˆูŠ ุชูƒุงู…ู„ ุณุงู„ู sin X ุงู„ุณูƒ ู…ู‚ู„ุจ ุงู„ cos X DX

449
00:49:15,810 --> 00:49:20,570
ุงุธู† ุงู„ุจุณุทุฉ ูุงุถู„ ุงู„ู…ู‚ุงู… ูŠุจู‚ู‰ ุงู„ุฌูˆุงุจ ู„ูŠู† absolute

450
00:49:20,570 --> 00:49:28,570
value ู„ cos X ูŠุจู‚ู‰ ุฌุจุช ุงู„ุณูŠู‡ุงุชูŠ ุชู„ุงุชุฉ ูŠุจู‚ู‰ ุณุงุฑ YP

451
00:49:28,570 --> 00:49:33,720
ูŠุณุงูˆูŠ ูˆูŠู† YP ูŠุง ุจู†ุงุชู‡ูŠู‡ุจุฏูŠ ุงุดูŠู„ ุงู„ู€ C1 ุงู„ู€ C1

452
00:49:33,720 --> 00:49:38,720
ุฌูŠุจู†ุงู‡ุง ุงู„ู„ูŠ ู‡ูŠ ู‚ุฏุงุด ุงู„ู„ูŠ ู‡ูŠ ุงู„ N absolute value

453
00:49:38,720 --> 00:49:47,480
ู„ุณูƒ ุงู„ X ุฒุงุฆุฏ ุชุงู†ูŠ ุงู„ X ุฒุงุฆุฏ C2 ูˆูŠู† C2 ู‡ูŠูˆ ุฒุงุฆุฏ

454
00:49:47,480 --> 00:49:52,280
ุงู„ู„ูŠ ู‡ูŠ ู†ุงู‚ุต X ููŠ ู…ูŠู†ุŸ ููŠ cosine ุงู„ X

455
00:50:04,270 --> 00:50:12,930
ูŠุจู‚ู‰ y ูŠุณูˆู‰ yc ู‡ูŠ

456
00:50:12,930 --> 00:50:23,580
ุชุญุช ูŠุจู‚ู‰ c ูˆุงุญุฏุฒุงุฆุฏ C2 Cos X ุฒุงุฆุฏ C3 Sin X ุฒุงุฆุฏ YP

457
00:50:23,580 --> 00:50:28,540
ู‡ุงูŠ ูˆ ุจุฏู‰ ู†ุฒู„ู‡ ุฒูŠ ู…ุง ู‡ูˆ ุจุณ ู„ูŠู‡ ุฎุงุทุฑ ุงุฑุชุจู‡ ูŠุจู‚ู‰ ู‡ุงูŠ

458
00:50:28,540 --> 00:50:36,820
Sin X ููŠ Lin absolute value ู„ Cos X ู†ุงู‚ุต X ููŠ Cos

459
00:50:36,820 --> 00:50:45,600
X ุฒุงุฆุฏ Lin absolute value ู„ุณูƒ Xุฒุงุฆุฏ ุชุงู† ุงู„ X ูˆูƒุงู†

460
00:50:45,600 --> 00:50:50,160
ุงู„ู„ู‡ ุจุงู„ุณุฑ ุนู„ูŠู†ุง ูŠุจู‚ู‰ ู‡ุฐุง ุญู„ ุงู„ุณุคุงู„ ุงู„ู„ูŠ ุนู†ุฏู†ุง

461
00:50:50,160 --> 00:50:54,780
ุชู…ุงู… ูˆ ู‡ูƒุฐุง ูŠุนู†ูŠ ุงู„ุดุบู„ ุจู‡ุฐู‡ ุงู„ุทุฑูŠู‚ุฉ ุทุจุนุง ู„ูˆ ุฌูŠุจู†ุงูƒ

462
00:50:54,780 --> 00:50:58,200
ุณุคุงู„ ููŠ ุงู„ุงู…ุชุญุงู† ู„ู† ูŠุฒูŠุฏ ุนู† ุงู„ุฑุชุจุฉ ุงู„ุชุงู„ุชุฉ ุงู†

463
00:50:58,200 --> 00:51:01,780
ุฏุฎู„ู†ุง ููŠ ุงู„ุฑุชุจุฉ ุงู„ุฑุงุจุนุฉุจุฏูƒ ู…ุญุฏุฏ ู…ู† ุงู„ุฏุฑุฌุฉ ุงู„ุฑุงุจุนุฉ

464
00:51:01,780 --> 00:51:05,760
ุจูŠุงุฎุฏ ูˆู‚ุช ูƒุชูŠุฑ ูˆ ุงู†ุช ุชุญู„ ููŠู‡ ูŠุจู‚ู‰ ูู‚ุท ู…ู† ุงู„ุฏุฑุฌุฉ

465
00:51:05,760 --> 00:51:11,260
ุงู„ุซุงู„ุซุฉ ุงูˆ ุงู„ุฏุฑุฌุฉ ุงู„ุซุงู†ูŠุฉ ุงู† ุดุงุก ุงู„ู„ู‡ ู„ุงุฒู„ู†ุง ููŠ

466
00:51:11,260 --> 00:51:15,600
ู†ูุณ ุงู„ section ูˆ ู„ู…ุง ู†ู†ุชู‡ูŠ ุจุนุฏ ููŠ ุนู†ุฏู‰ ุจุนุถ ุงู„ุฃู…ุซู„ุฉ

467
00:51:15,600 --> 00:51:20,060
ุนู„ู‰ ู†ูุณ ุงู„ู…ูˆุถูˆุน ุจุงู„ุงุถุงูุฉ ุงู„ู‰ ุงุฎุฑ ุทุฑูŠู‚ุฉ ุงู„ู„ู‰ ู‡ูŠ

468
00:51:20,060 --> 00:51:24,340
ุทุฑูŠู‚ุฉ reduction of order ู„ุงุฎุชุฒุงู„ ุงู„ุฑุชุจุฉ ู„ู„ู…ุญุงุถุฑุฉ

469
00:51:24,340 --> 00:51:26,760
ุงู„ูŠูˆู… ุจุนุฏ ุงู„ุธู‡ุฑ ุงู† ุดุงุก ุงู„ู„ู‡ ูˆ ุชุนุงู„ู‰