Расчетные задания (Кузнецов) / 5-Дифур
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Найти линию, проходящую через точку M 0 |
и обладающую тем свойством, что в любой ее точке M |
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касательный вектор |
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с концом на оси Oy имеет проекцию на ось Oy , равную a . |
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MN |
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26. |
M 0 |
(1,2), a = −1. |
29. |
M 0 |
(1,3), a = −4. |
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27. |
M 0 |
(1,4), a = 2. |
30. |
M 0 |
(1,6), a = 3. |
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28. |
M 0 |
(1,5), a = −2. |
31. |
M 0 |
(1,1), a =1. |
Задача 10. Найти общее решение дифференциального уравнения.
1.y′′′x ln x = y′′.
2.xy′′′+ y′′ =1.
3.2xy′′′ = y′′.
4.xy′′′+ y′′ = x +1.
5.tgxy′′− y′+ sin1 x = 0.
6.x2 y′′+ xy′ =1.
7.y′′′ctg2x + 2 y′′ = 0.
8.x3 y′′′+ x2 y′′ =1.
9.y′′′tgx = 2 y′′.
10.y′′′cth2x = 2 y′′.
11.x4 y′′+ x3 y′ =1.
12.xy′′′+ 2 y′′ = 0.
13.(1 + x2 ) y′′+ 2xy′ =
14.x5 y′′′+ x4 y′′ =1.
15.xy′′′− y′′+ 1x = 0.
16.xy′′′+ y′′+ x = 0.
17.thx y|V = y′′′.
18.xy′′′+ y′′ = x.
19.y′′′tgx = y′′+1.
20.y′′′tg5x = 5 y′′.
21.y′′′ th7x = 7 y′′.
22.x3 y′′′+ x2 y′′ = x.
23.cthx y′′− y′+ chx1
x3 .
= 0.
24. (x +1) y′′′+ y′′ = (x +1).
25. |
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(1 +sin x) y |
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26. |
x . |
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27.− xy′′′+ 2 y′′ = x22 .
28.cthx y′′+ y′ = chx.
29.x4 y′′+ y′ = chx.
30.y′′+ x22x+1 y′ = 2x.
31.
(1 + x2 ) y′′+ 2xy′ =12x3 .
Задача 11. Найти решение задачи Коши.
1.4 y3 y′′ = y4 −1, y(0) = 2, y′(0) =1/(2 2).
2.y′′ =128y3 , y(0) =1, y′(0) = 8.
3.y3 y′′+64 = 0, y(0) = 4, y′(0) = 2.
4.y′′+ 2sin y cos3 y = 0, y(0) = 0, y′(0) =1.
5. y′′ = 32sin 3 y cos y, y(1) =π / 2, y′(1) = 4.
6.y′′ = 98y3 , y(1) =1, y′(1) = 7.
7.y3 y′′+ 49 = 0, y(3) = −7, y′(3) = −1.
8. 4 y |
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−1, y(0) = |
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2 . |
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, y (0) |
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9.y′′+8sin y cos3 y = 0, y(0) = 0, y′(0) = 2.
10.y′′ = 72 y3 , y(2) =1, y′(2) = 6.
11.y3 y′′+36 = 0, y(0) = 3, y′(0) = 2.
12.y′′ =18sin 3 y cos y, y(1) =π / 2, y′(1) = 3.
13. 4 y |
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−16, y(0) = 2 2, y (0) |
14.y′′ = 50 y3 , y(3) =1, y′(3) = 5.
15.y3 y′′+ 25 = 0, y(2) = −5, y′(2) = −1.
16.y′′+18sin y cos3 y = 0, y(0) = 0, y′(0) = 3.
17.y′′ = 8sin 3 y cos y, y(1) =π / 2, y′(1) = 2.
18.y′′ = 32 y3 , y(4) =1, y′(4) = 4.
19.y3 y′′+16 = 0, y(1) = 2, y′(1) = 2.
20.y′′+32sin y cos3 y = 0, y(0) = 0, y′(0) = 4.
21. y′′ = 50sin 3 y cos y = y4 −1, y(1) =π / 2, y′(1) = 5.
22.y′′ =18y3 , y(1) =1, y′(1) = 3.
23.y3 y′′+9 = 0, y(1) =1, y′(1) = 3.
24.y3 y′′ = 4( y4 −1), y(0) = 2, y′(0) = 2.
25.y′′+50sin y cos3 y = 0, y(0) = 0, y′(0) = 5.
26.y′′ = 8y3 , y(0) =1, y′(0) = 2.
27.y3 y′′+ 4 = 0, y(0) = −1, y′(0) = −2.
28.y′′ = 2 sin 3 y cos y, y(1) =π / 2, y′(1) =1.
29.y3 y′′ = y4 −16, y(0) = 2 2, y′(0) = 2.
30.y′′ = 2 y3 , y(−1) =1, y′(−1) =1.
31.y3 y′′+1 = 0, y(1) = −1, y′(1) = −1.
Задача 12. Найти общее решение дифференциального уравнения. |
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1. |
y′′′+3y′′+2 y′ =1 − x2 . |
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y|V |
−2 y′′′+ y′′ = 2x(1 − x). |
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2. |
y′′′− y′′ = 6x2 +3x. |
7. |
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y|V |
+ 2 y′′′+ y′′ = x2 + x −1. |
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3. |
y′′′− y′ = x2 + x. |
8. |
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yV |
− y|V = 2x +3. |
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4. |
y|V |
−3y′′′+3y′′− y′ = 2x. |
9. |
3 =1 − x2 . |
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5. |
y|V |
− y′′′ = 5(x + 2)2 . |
10. |
y|V + 2 y′′′+ y′′ = 4x2 . |
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11. |
y′′′+ y′′ = 5x2 |
−1. |
22. |
y′′′−2 y′′ = 3x2 + x −4. |
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12. |
y|V |
+ 4 y′′′+ 4 y′′+ 2 y′ = x − x2 . |
23. |
y′′′−13y′′+12 y′ = x −1. |
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13. |
7 y′′′− y′′ =12x. |
24. |
y|V + y′′′ = x. |
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14. |
y′′′+3y′′+ 2 y′ = 3x2 + 2x. |
25. |
y′′′+3y′′+ 2 y′ = x2 |
+ 2x +3. |
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15. |
y′′′− y′ = 3x2 |
−2x +1. |
26. |
y′′′+3y′′+ 2 y′ = x2 |
+ 2x +3. |
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16. |
y′′′− y′′ = 4x2 |
−3x + 2. |
27. |
y′′′−5y′′+6 y′ = (x −1)2 . |
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17. |
y|V |
−3y′′′+3y′′− y′ = x −3. |
28. |
y|V −6 y′′′+9 y′′ = 3x −1. |
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18. |
y|V |
+ 2 y′′′+ y′′ =12x2 −6x. |
29. |
y′′′−13y′′+12 y′ =18x2 −39. |
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19. |
y′′′−4 y′′ = 32 −384x2 . |
30. |
y|V + y′′′ =12x +6. |
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20. |
y|V |
+ 2 y′′′+ y′′ = 2 −3x2 . |
31. |
y′′′−5 y′′+6 y′ = 6x2 +2x −5. |
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21. |
y′′′+ y′′ = 49 −24x2 . |
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Задача 13. Найти общее решение дифференциального уравнения.
1.y′′′−4 y′′+5y′−2 y = (16 −12x)e−x .
2.y′′′−3y′′+ 2 y′ = (1 −2x)ex .
3.y′′′− y′′− y′+ y = (3x +7)e2 x .
4.y′′′−2 y′′+ y′ = (2x +5)e2 x .
5.y′′′−3y′′+ 4 y = (18x −21)e−x .
6.y′′′−5 y′′+8y′−4 y = (2x −5)ex .
7.y′′′−4 y′′+ 4 y′ = (x −1)ex .
8.y′′′+ 2 y′′+ y′ = (18x + 21)e2 x .
9.y′′′+ y′′− y′− y = (8x + 4)ex .
10.y′′′−3y′′−2 y = −4xex .
11.y′′′−3y′′+ 2 y = (4x +9)e2 x .
12.y′′′+ 4 y′′+5y′+ 2 y = (12x +16)ex .
13.y′′′− y′′−2 y′ = (6x −11)e−x .
14.y′′′+ y′′−2 y′ = (6x +5)ex .
15.y′′′+ 4 y′′+ 4 y′ = (9x +15)ex .
16.y′′′−3y′′− y′+3y = (4 −8x)ex .
17.y′′′− y′′−4 y′+ 4 y = (7 −6x)ex .
18.y′′′+3y′′+ 2 y′ = (1 −2x)e−x .
19.y′′′−5 y′′+7 y′−3y = (20 −16x)e−x .
20.y′′′−4 y′′+3y′ = −4xex .
21.y′′′−5 y′′+3y′+9 y = e−x (32x −32).
22.y′′′−6 y′′+9 y′ = 4xex .
23.y′′′−7 y′′+15y′−9 y = (8x −12)ex .
24.y′′′− y′′−5y′−3y = −(8x + 4)ex .
25.y′′′+5 y′′+7 y′+3y = (16x + 20)ex .
26.y′′′−2 y′′−3y′ = (8x −14)e−x .
27.y′′′+ 2 y′′−3y′ = (8x +6)ex .
28.y′′′+6 y′′+9 y′ = (16x + 24)ex .
29.y′′′− y′′−9 y′+9 y = (12 −16x)ex .
30.y′′′+ 4 y′′+3y′ = 4(1 − x)e−x .
31.y′′′+ y′′−6 y′ = (20x +14)e2 x .
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Задача 14. Найти общее решение дифференциального уравнения.
1.y′′+ 2 y′ = 4ex (sin x +cos x).
2.y′′−4 y′+ 4 y = −e2 x sin 6x.
3.y′′+ 2 y′ = −2ex (sin x +cos x).
4.y′′+ y = 2 cos 7x +3sin 7x.
5.y′′+ 2 y′+5 y = −sin 2x.
6.y′′−4 y′+8y = ex (5sin x −3cos x).
7.y′′+ 2 y′ = ex (sin x +cos x).
8.y′′−4 y′+ 4 y = e2 x sin 3x.
9.y′′+6 y′+13y = e−3x cos 4x.
10.y′′+ y = 2 cos 3x −3sin 3x.
11.y′′+ 2 y′+5y = −2 sin x.
12.y′′−4 y′+8y = ex (−3sin x + 4 cos x).
13.y′′+ 2 y′ =10ex (sin x +cos x).
14.y′′−4 y′+ 4 y = e2 x sin 5x.
15.y′′+ y = 2 cos 5x +3sin 5x.
16.y′′+ 2 y′+5 y = −17 sin 2x.
17.y′′+6 y′+13y = e−3x cos x.
18.y′′−4 y′+8y = ex (3sin x +5 cos x).
19.y′′+ 2 y′ = 6ex (sin x +cos x).
20.y′′−4 y′+ 4 y = −e2 x sin 4x.
21.y′′+6 y′+13y = e−3x cos 5x.
22. y′′+ y = 2 cos 7x −3sin 7x.
23.y′′+ 2 y′+5 y = −cos x.
24.y′′−4 y′+8y = ex (2sin x −cos x).
25.y′′+ 2 y′ = 3ex (sin x +cos x).
26.y′′−4 y′+ 4 y = e2 x sin 4x.
27.y′′+6 y′+13y = e−3x cos8x.
28. y′′+ 2 y′+5y =10 cos x.
29.y′′+ y = 2 cos 4x +3sin 4x.
30.y′′−4 y′+8y = ex (−sin x + 2 cos x).
31.y′′−4 y′+ 4 y = e2 x sin 6x.
Задача 15. Найти общее решение дифференциального уравнения.
1.y′′−2 y′ = 2ch2x.
2.y′′+ y = 2sin x −6 cos x + 2ex .
3.y′′− y′ = 2ex +cos x.
4.y′′−3y′ = 2ch3x.
5.y′′+ 4 y = −8sin 2x +32 cos 2x + 4e2 x .
6.y′′′− y′ =10sin x +6 cos x + 4ex .
7.y′′−4 y′ =16ch4x.
8.y′′+9 y = −18sin 3x −18e3x .
9.y′′′−4 y′ = 24e2 x −4 cos 2x +8sin 2x.
10.y′′−5 y′ = 50ch5x.
11.y′′+16 y =16 cos 4x −16e4 x .
12.y′′′−9 y′ = −9e3x +18sin 3x −9 cos 3x.
13.y′′− y′ = ch2x.
14.y′′+ 25y = 20 cos 5x −10sin 5x +50e5 x .
15.y′′′−16 y′ = 48e4 x +64 cos 4x −64sin 4x.
16.y′′+ 2 y′ = 2sh2x.
17.y′′+36 y = 24sin 6x −12 cos 6x +36e6 x .
18.y′′′−25y′ = 25(sin 5x +cos 5x) −50e5 x .
19.y′′+3y′ = 2sh3x.
20.y′′+ 49 y =14sin 7x +7 cos 7x −98e7 x .
21.y′′′−36 y′ = 36e6 x −72(cos 6x +sin 6x).
22.y′′+ 4 y′ =16sh4x.
23.y′′+64 y =16sin 8x −16 cos8x −64e8 x .
24.y′′′−49 y′ =14e7 x −49(cos 7x +sin 7x).
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y′′+5y′ = 50sh5x. |
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25. |
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29. y′′+100 y = 20sin10x −30 cos10x −200e10 x . |
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y′′+81y = 9 sin 9x +3cos 9x +162e9 x . |
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30 y′′′−81y′ =162 e9 x +81sin 9x. |
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27. |
y′′′−64 y′ =128cos8x −64e8 x . |
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31. y′′′−100 y′ = 20e10 x +100 cos10x. |
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28. |
y′′+ y′ = 2shx. |
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Задача 16. Найти решение задачи Коши. |
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y = cosπx , y(0) = 3, y (0) |
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3. |
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6. y′′ |
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8.y′′−3y′ = 3 +e−3x , y(0) = 4 ln 4, y′(0) = 4(3ln 4 −1).
9.y′′+ y = 4ctgx, y(π / 2) = 4, y′(π / 2) = 4.
10.y′′−6 y′+8 y = 2 +4e−2 x , y(0) =1 +3ln 3, y′(0) =10 ln 3.
4e−2 x
11.y′′+6 y′+8 y = 2 +e2 x , y(0) = 0, y′(0) = 0.
12.y′′+9 y = sin93x , y(π / 6) = 4, y′(π / 6) = 3π / 2.
13.y′′+9 y = cos93x , y(0) =1, y′(0) = 0.
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14. |
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15. |
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, y(0) =1 +8 ln 2, y |
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17. y′′−6 y′+8y = 1 +e−2 x , y(0) = 0, y′(0) = 0.
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18.y′′+16 y = sin164x , y(π / 8) = 3, y′(π / 8) = 2π.
19.y′′+16 y = cos164x , y(0) = 3, y′(0) = 0.
20. |
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= 1 +e−2 x , y(0) = ln 4, y (0) = ln 4 −2. |
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, y(0) =1 +3ln 3, y (0) |
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, y(0) = 0, y (0) = 0. |
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+ 4 y = sin 2x , y(π / 4) = 2, y (π / 4) |
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, y(0) = ln 27, y (0) |
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27.y′′+ y = 2ctgx, y(π / 2) =1, y′(π / 2) = 2.
28.y′′−3y′+ 2 y = 1 +1e−x , y(0) =1 + 2 ln 2, y′(0) = 3ln 2.
ex
29.y′′−3y′+ 2 y = 1 +e−x , y(0) = 0, y′(0) = 0.
30.y′′+ y = sin1 x , y(π / 2) =1, y′(π / 2) =π / 2.
31.y′′+ y = cos1 x , y(0) =1, y′(0) = 0.