Sr Examen
Ecuación diferencial (ycos(xy)+1+tg^2(x))dx+(xcos(xy)-(7/(y+1)^2))dy=0
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Solución
Ha introducido
[src]
2 7*dy d
1 + tan (x) + cos(x*y(x))*y(x) - ------------------------- + x*--(y(x))*cos(x*y(x)) = 0
2 dx
dx + dx*y (x) + 2*dx*y(x)
$$- \frac{7 dy}{dx y^{2}{\left(x \right)} + 2 dx y{\left(x \right)} + dx} + x \cos{\left(x y{\left(x \right)} \right)} \frac{d}{d x} y{\left(x \right)} + y{\left(x \right)} \cos{\left(x y{\left(x \right)} \right)} + \tan^{2}{\left(x \right)} + 1 = 0$$
-7*dy/(dx*y^2 + 2*dx*y + dx) + x*cos(x*y)*y' + y*cos(x*y) + tan(x)^2 + 1 = 0
Clasificación
factorable
lie group