1, 2,..., n , ( ). , , :
= 1() 1 + 2() 2 +... + n () n,
1, 2,..., n , 1(), 2(),..., n () :
|
, .. , W (x) ¹ 0.
1.
y ' + x ∙ y '' = x 2.
. . .
1.
x ∙ y '' + y ' = 0.
, . y ' = z, , y '' = z,
x ∙ z ' + z = 0.
. :
Þ Þ Þ .
, : . :
Þ Þ
. , , , 2 = 1
2. :
.
1(), 2() :
, ¹ 0,
.
f (x) = , , 2 = 1 (21) :
Þ
, :
;
.
y ', y '' (22),
.
Þ Þ .
(21) .
, .
, 1(), 2() (20), (18):
,
1, 2 .
, = 0 (18) y ' = 0. : = .
2.
.
. . .
1.
|
|
.
.
.
k 1= 1, k 2= 1, k 3= 2 (. 2.3, 1). ,
= 1 x + C 2 - + C 3 2.
, , 1 = , 2 = -, 3 = 2 .
2.
= 1() x + C 2() + C 3() 2. (23)
1(), 2(), 3() (17).
Þ
Þ
, , :
, , .
, :
;
;
.
, 1(), 2(), 3() (23), :
= x + - + 2 =
= 1 x + C 2 - + C 3 2 + ,
1, 2, 3 .
:
1. . | 2. . |
3. | 4. . |
5. . | 6. . |
7. . | 8. . |
9. | 10. |
11. . | 12. . |
13. . | 1 4. . |
15. . | 1 6. . |
17. . | 18. . |
19. . | 20. . |
21. . | 22. . |
23. . | 24. . |
25. . | 26. . |
27. . | 28. . |
29. . | 30. . |
31. . | 32. |