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Ecuación diferencial dy/dx=x+5y^3/4y^3-15xy^2

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]
                  6                
d              5*y (x)         2   
--(y(x)) = x + ------- - 15*x*y (x)
dx                4                
$$\frac{d}{d x} y{\left(x \right)} = - 15 x y^{2}{\left(x \right)} + x + \frac{5 y^{6}{\left(x \right)}}{4}$$
y' = -15*x*y^2 + x + 5*y^6/4
Respuesta [src]
                                                                                                                                                                                                                                                                  /                                                                                                                                                                                                                                                                                 /                                                                                /                                                                /            9\\                                   /                      /             9\          /            9\\                       \\        
                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                 |                                                                                |                                                              2 |      825*C1 ||                                   |                    2 |      4125*C1 |        2 |      825*C1 ||                       ||        
                                                                                                        /                                                                             /                      /             9\          /            9\\\          |                                                                                                                                                                                                                                                                                 |                                                                                |                          11          /             9\   75*C1 *|-30 + -------||                                   |                5*C1 *|-30 + --------|   15*C1 *|-30 + -------||                       ||        
                                                                                                        |                                                                             |                    2 |      4125*C1 |        2 |      825*C1 |||          |                                                                                                                                               /                                                                               9 /75          2\                       \         |                                                                              9 |             2   185625*C1          2 |      4125*C1 |          \         8   /|        9 /75          2\        9 |75          2         \         4    /          \         8   /|                       ||        
                                                         /                     /            9\\         |                                                                             |                5*C1 *|-30 + --------|   15*C1 *|-30 + -------|||          |             /                      /             9\          /            9\\                                                                 |                              /             9\          /            9\   15*C1 *|-- - 1050*C1 |         9 /         2\|         |                              /             9\          /            9\   5*C1 *|150 - 6300*C1  + ----------- + 15*C1 *|-30 + --------| + ----------------------|   15*C1 *|-- - 1050*C1 |   15*C1 *|-- - 1050*C1  + ---------------------- + ----------------------|         9 /         2\||        
                                                         |                   2 |      825*C1 ||         |                                                   9 /75          2\       9 |75          2         \         4    /          \         8   /||          |             |                    2 |      4125*C1 |        2 |      825*C1 ||                                                               2 |             2   /         2\ |      4125*C1 |        2 |      825*C1 |          \2            /   375*C1 *\1 - 42*C1 /|       2 |             2   /         2\ |      4125*C1 |        2 |      825*C1 |         \                      16              \         4    /             2           /          \2            /          \2                         4                        2           /   375*C1 *\1 - 42*C1 /||        
               /                  11\                    |               5*C1 *|-30 + -------||         |                             /            9\   5*C1 *|-- - 1050*C1 |   5*C1 *|-- - 1050*C1  + ---------------------- + ----------------------||          |             |                5*C1 *|-30 + --------|   15*C1 *|-30 + -------||                                                           5*C1 *|-60 + 2700*C1  + \1 - 15*C1 /*|-30 + --------| - 30*C1 *|-30 + -------| + ---------------------- + --------------------|   5*C1 *|-60 + 2700*C1  + \1 - 15*C1 /*|-30 + --------| - 30*C1 *|-30 + -------| + --------------------------------------------------------------------------------------- + ---------------------- + ------------------------------------------------------------------------ + --------------------||        
             2 |         2   75*C1  |               5  3 |15         2         \         8   /|       4 |            2   /         2\ |      825*C1 |         \2            /         \2                         4                        2           /|     4  5 |/         2\ |75          2         \         4    /          \         8   /|     /         2\ /75          2\        2 /          2\         \                              \         4    /          \         8   /             2                       2          /         \                              \         4    /          \         8   /                                              4                                                        2                                                 2                                                2          /|        
            x *|1 - 15*C1  + -------|         6   C1 *x *|-- - 150*C1  + ---------------------|   C1*x *|-60 + 900*C1  + \1 - 15*C1 /*|-30 + -------| + --------------------- + -----------------------------------------------------------------------|   C1 *x *|\1 - 15*C1 /*|-- - 1050*C1  + ---------------------- + ----------------------| + 2*\1 - 15*C1 /*|-- - 1050*C1 | + 75*C1 *\-1 + 45*C1 / + ------------------------------------------------------------------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|        
               \                8   /   5*x*C1           \2                        4          /         \                             \         8   /             4                                                4                                   /          \             \2                         4                        2           /                  \2            /                                                                                         4                                                                                                                                                                                                                   4                                                                                                                                                  /    / 6\
y(x) = C1 + ------------------------- + ------- + --------------------------------------------- + ------------------------------------------------------------------------------------------------------------------------------------------------------ + ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + O\x /
                        2                  4                            6                                                                                                   24                                                                                                                                                                                                                                                                                                                                                                       120                                                                                                                                                                                                                                                                                                   
$$y{\left(x \right)} = \frac{x^{2} \left(\frac{75 C_{1}^{11}}{8} - 15 C_{1}^{2} + 1\right)}{2} + C_{1} + \frac{C_{1} x^{4} \left(\frac{5 C_{1}^{9} \left(\frac{75}{2} - 1050 C_{1}^{2}\right)}{4} + \frac{5 C_{1}^{9} \left(\frac{15 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right)}{2} + \frac{5 C_{1}^{2} \left(\frac{4125 C_{1}^{9}}{4} - 30\right)}{4} - 1050 C_{1}^{2} + \frac{75}{2}\right)}{4} + 900 C_{1}^{2} + \left(1 - 15 C_{1}^{2}\right) \left(\frac{825 C_{1}^{9}}{8} - 30\right) - 60\right)}{24} + \frac{C_{1}^{4} x^{5} \left(75 C_{1}^{2} \left(45 C_{1}^{2} - 1\right) + \frac{5 C_{1}^{2} \left(\frac{375 C_{1}^{9} \left(1 - 42 C_{1}^{2}\right)}{2} + \frac{15 C_{1}^{9} \left(\frac{75}{2} - 1050 C_{1}^{2}\right)}{2} - 30 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right) + 2700 C_{1}^{2} + \left(1 - 15 C_{1}^{2}\right) \left(\frac{4125 C_{1}^{9}}{4} - 30\right) - 60\right)}{4} + \frac{5 C_{1}^{2} \left(\frac{375 C_{1}^{9} \left(1 - 42 C_{1}^{2}\right)}{2} + \frac{15 C_{1}^{9} \left(\frac{75}{2} - 1050 C_{1}^{2}\right)}{2} + \frac{15 C_{1}^{9} \left(\frac{15 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right)}{2} + \frac{5 C_{1}^{2} \left(\frac{4125 C_{1}^{9}}{4} - 30\right)}{4} - 1050 C_{1}^{2} + \frac{75}{2}\right)}{2} + \frac{5 C_{1}^{9} \left(\frac{185625 C_{1}^{11}}{16} + \frac{75 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right)}{2} + 15 C_{1}^{2} \left(\frac{4125 C_{1}^{9}}{4} - 30\right) - 6300 C_{1}^{2} + 150\right)}{4} - 30 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right) + 2700 C_{1}^{2} + \left(1 - 15 C_{1}^{2}\right) \left(\frac{4125 C_{1}^{9}}{4} - 30\right) - 60\right)}{4} + 2 \left(1 - 15 C_{1}^{2}\right) \left(\frac{75}{2} - 1050 C_{1}^{2}\right) + \left(1 - 15 C_{1}^{2}\right) \left(\frac{15 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right)}{2} + \frac{5 C_{1}^{2} \left(\frac{4125 C_{1}^{9}}{4} - 30\right)}{4} - 1050 C_{1}^{2} + \frac{75}{2}\right)\right)}{120} + \frac{C_{1}^{5} x^{3} \left(\frac{5 C_{1}^{2} \left(\frac{825 C_{1}^{9}}{8} - 30\right)}{4} - 150 C_{1}^{2} + \frac{15}{2}\right)}{6} + \frac{5 C_{1}^{6} x}{4} + O\left(x^{6}\right)$$
Gráfico para el problema de Cauchy
Clasificación
1st power series
lie group
Respuesta numérica [src]
(x, y):
(-10.0, 0.75)
(-7.777777777777778, 343.6374734672405)
(-5.555555555555555, 2.17e-322)
(-3.333333333333333, nan)
(-1.1111111111111107, 2.78363573e-315)
(1.1111111111111107, 8.427456047434801e+197)
(3.333333333333334, 3.1933833808213433e-248)
(5.555555555555557, 2.125757255287192e+160)
(7.777777777777779, 8.388243566974167e+296)
(10.0, 3.861029683e-315)
(10.0, 3.861029683e-315)