El profesor se sorprenderá mucho al ver tu solución correcta😉
d 2 --(y(x)) = (-7 + x + y(x)) dx
y' = (x + y - 7)^2
f1(x)*g1(u)*u' = f2(x)*g2(u),
g1(u)/g2(u)*u'= f2(x)/f1(x).
3 / 2 2 / 2 \ / 2 2\\ 4 / / 2 2\ / 2 \ / / 2 2\ / 2 \\ / 2 \\ 5 / 2 2 / / 2 2\ / 2 \\ / 2 \ / 2 2\ / 2 \ / 2 2 / / 2 2\ / 2 \\ / 2 \ / 2 2\\\ / 2 \ 2 / / 2 \\ x *\50 + C1 - 14*C1 + 2*(-7 + C1) + \49 + C1 - 14*C1/*\50 + C1 - 14*C1 + 2*(-7 + C1) // x *\-21 + 3*C1 + (-7 + C1)*\50 + C1 - 14*C1 + 2*(-7 + C1) / + \49 + C1 - 14*C1/*\-21 + 3*C1 + (-7 + C1)*\50 + C1 - 14*C1 + 2*(-7 + C1) / + 3*(-7 + C1)*\49 + C1 - 14*C1// + 3*(-7 + C1)*\49 + C1 - 14*C1// x *\100 - 28*C1 + 2*C1 + 7*(-7 + C1) + (-7 + C1)*\-21 + 3*C1 + (-7 + C1)*\50 + C1 - 14*C1 + 2*(-7 + C1) / + 3*(-7 + C1)*\49 + C1 - 14*C1// + \49 + C1 - 14*C1/*\100 - 28*C1 + 2*C1 + 7*(-7 + C1) / + \49 + C1 - 14*C1/*\100 - 28*C1 + 2*C1 + 7*(-7 + C1) + (-7 + C1)*\-21 + 3*C1 + (-7 + C1)*\50 + C1 - 14*C1 + 2*(-7 + C1) / + 3*(-7 + C1)*\49 + C1 - 14*C1// + \49 + C1 - 14*C1/*\100 - 28*C1 + 2*C1 + 7*(-7 + C1) /// / 6\ y(x) = C1 + x*\49 + C1 - 14*C1/ + x *\-7 + C1 + (-7 + C1)*\49 + C1 - 14*C1// + ------------------------------------------------------------------------------------------- + --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + O\x / 3 6 15
(x, y):
(-10.0, 0.75)
(-7.777777777777778, 15.642339349557037)
(-5.555555555555555, 494494074302.16876)
(-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, 8.388243567338116e+296)
(10.0, 3.861029683e-315)
(10.0, 3.861029683e-315)