Sr Examen

Ecuación diferencial 4(3x+y-2)dx−(3x+y)dy=0

El profesor se sorprenderá mucho al ver tu solución correcta😉

v

Para el problema de Cauchy:

y() =
y'() =
y''() =
y'''() =
y''''() =

Gráfico:

interior superior

Solución

Ha introducido [src]
                     d                   d           
-8 + 4*y(x) + 12*x - --(y(x))*y(x) - 3*x*--(y(x)) = 0
                     dx                  dx          
$$- 3 x \frac{d}{d x} y{\left(x \right)} + 12 x - y{\left(x \right)} \frac{d}{d x} y{\left(x \right)} + 4 y{\left(x \right)} - 8 = 0$$
-3*x*y' + 12*x - y*y' + 4*y - 8 = 0
Respuesta [src]
                                                                                                                                                                                                               /                                        /                              /             /     12\                       \                                                                                                                   \     /             /     12\                       \                                                                                                                      \        
                                                                                                                                                                                                               |                                        |                              |           8*|-7 + --|                       |                                                                                                                   |     |           8*|-7 + --|                       |                                                                                                                      |        
                                                /                       /             /     12\                       \      /     12\                       \                                                 |                 /     12\              |                /     12\     |     144     \     C1/      /    2 \ /    16\|              /              /     12\      /    16\                        \      /    16\                        |     |     144     \     C1/      /    2 \ /    16\|               /              /     12\      /    16\                        \       /    16\                         |        
                                                |                       |           8*|-7 + --|                       |   24*|-7 + --|                       |                                                 |              36*|-7 + --|              |             12*|-7 + --|   2*|63 - --- + ----------- + 12*|1 - --|*|7 - --||              |            4*|-7 + --|   12*|7 - --|                        |   36*|7 - --|                        |   6*|63 - --- + ----------- + 12*|1 - --|*|7 - --||               |            4*|-7 + --|   12*|7 - --|                        |   108*|7 - --|                         |        
                              2 /    8 \      4 |      432     /    2 \ |     144     \     C1/      /    2 \ /    16\|      \     C1/      /    2 \ /    16\|      3 /      36     /    2 \ /     12\\      5 |       1620      \     C1/     /    2 \ |       540      \     C1/     \      C1        C1          \    C1/ \    C1//     /    2 \ |      180     \     C1/      \    C1/      /    2 \ /     20\|      \    C1/      /    2 \ /     20\|     \      C1        C1          \    C1/ \    C1//      /    2 \ |      180     \     C1/      \    C1/      /    2 \ /     20\|       \    C1/       /    2 \ /     20\|        
                           4*x *|7 - --|   2*x *|189 - --- + 4*|1 - --|*|63 - --- + ----------- + 12*|1 - --|*|7 - --|| + ------------ + 36*|1 - --|*|7 - --||   8*x *|-21 + -- + 4*|1 - --|*|-7 + --||   8*x *|-567 + ---- - ------------ + 4*|1 - --|*|-189 + --- - ------------ + ------------------------------------------------- + 4*|1 - --|*|-63 + --- - ----------- + ----------- + 12*|1 - --|*|-7 + --|| + ----------- + 36*|1 - --|*|-7 + --|| + ------------------------------------------------- + 12*|1 - --|*|-63 + --- - ----------- + ----------- + 12*|1 - --|*|-7 + --|| + ------------ + 108*|1 - --|*|-7 + --||        
                /    2 \        \    C1/        \       C1     \    C1/ \      C1        C1          \    C1/ \    C1//        C1           \    C1/ \    C1//        \      C1     \    C1/ \     C1//        \        C1         C1          \    C1/ \        C1        C1                                C1                            \    C1/ \       C1        C1            C1          \    C1/ \     C1//        C1          \    C1/ \     C1//                           C1                             \    C1/ \       C1        C1            C1          \    C1/ \     C1//        C1            \    C1/ \     C1//    / 6\
y(x) = C1 + 4*x*|1 - --| + ------------- + ------------------------------------------------------------------------------------------------------------------- + -------------------------------------- + --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + O\x /
                \    C1/          2                                                                   4                                                                              3                                                                                                                                                                                                                                    5                                                                                                                                                                                                                  
                                C1                                                                3*C1                                                                           3*C1                                                                                                                                                                                                                                15*C1                                                                                                                                                                                                                   
$$y{\left(x \right)} = \frac{8 x^{5} \left(108 \left(-7 + \frac{20}{C_{1}}\right) \left(1 - \frac{2}{C_{1}}\right) + 12 \left(1 - \frac{2}{C_{1}}\right) \left(12 \left(-7 + \frac{20}{C_{1}}\right) \left(1 - \frac{2}{C_{1}}\right) - 63 - \frac{4 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} + \frac{12 \left(7 - \frac{16}{C_{1}}\right)}{C_{1}} + \frac{180}{C_{1}}\right) + 4 \left(1 - \frac{2}{C_{1}}\right) \left(36 \left(-7 + \frac{20}{C_{1}}\right) \left(1 - \frac{2}{C_{1}}\right) + 4 \left(1 - \frac{2}{C_{1}}\right) \left(12 \left(-7 + \frac{20}{C_{1}}\right) \left(1 - \frac{2}{C_{1}}\right) - 63 - \frac{4 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} + \frac{12 \left(7 - \frac{16}{C_{1}}\right)}{C_{1}} + \frac{180}{C_{1}}\right) - 189 - \frac{12 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} + \frac{36 \left(7 - \frac{16}{C_{1}}\right)}{C_{1}} + \frac{2 \left(12 \left(1 - \frac{2}{C_{1}}\right) \left(7 - \frac{16}{C_{1}}\right) + 63 + \frac{8 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} - \frac{144}{C_{1}}\right)}{C_{1}} + \frac{540}{C_{1}}\right) - 567 - \frac{36 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} + \frac{108 \left(7 - \frac{16}{C_{1}}\right)}{C_{1}} + \frac{6 \left(12 \left(1 - \frac{2}{C_{1}}\right) \left(7 - \frac{16}{C_{1}}\right) + 63 + \frac{8 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} - \frac{144}{C_{1}}\right)}{C_{1}} + \frac{1620}{C_{1}}\right)}{15 C_{1}^{5}} + \frac{2 x^{4} \left(36 \left(1 - \frac{2}{C_{1}}\right) \left(7 - \frac{16}{C_{1}}\right) + 4 \left(1 - \frac{2}{C_{1}}\right) \left(12 \left(1 - \frac{2}{C_{1}}\right) \left(7 - \frac{16}{C_{1}}\right) + 63 + \frac{8 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} - \frac{144}{C_{1}}\right) + 189 + \frac{24 \left(-7 + \frac{12}{C_{1}}\right)}{C_{1}} - \frac{432}{C_{1}}\right)}{3 C_{1}^{4}} + \frac{8 x^{3} \left(4 \left(-7 + \frac{12}{C_{1}}\right) \left(1 - \frac{2}{C_{1}}\right) - 21 + \frac{36}{C_{1}}\right)}{3 C_{1}^{3}} + \frac{4 x^{2} \left(7 - \frac{8}{C_{1}}\right)}{C_{1}^{2}} + 4 x \left(1 - \frac{2}{C_{1}}\right) + C_{1} + O\left(x^{6}\right)$$
Gráfico para el problema de Cauchy
Clasificación
factorable
1st power series
lie group
Respuesta numérica [src]
(x, y):
(-10.0, 0.75)
(-7.777777777777778, 10.529103193459795)
(-5.555555555555555, 19.071150785497284)
(-3.333333333333333, nan)
(-1.1111111111111107, 2.78363573e-315)
(1.1111111111111107, 8.427456047434801e+197)
(3.333333333333334, 3.1933833808213433e-248)
(5.555555555555557, 7.611001484716116e-42)
(7.777777777777779, 8.388243567338487e+296)
(10.0, 3.861029683e-315)
(10.0, 3.861029683e-315)