1.503 problem 505

Internal problem ID [8083]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 505.
ODE order: 1.
ODE degree: 2.

CAS Maple gives this as type [_separable]

\[ \boxed {x y^{2} {y^{\prime }}^{2}-2 y^{3} y^{\prime }+2 y^{2} x -x^{3}=0} \]

Solution by Maple

Time used: 0.015 (sec). Leaf size: 52

dsolve(x*y(x)^2*diff(y(x),x)^2-2*y(x)^3*diff(y(x),x)+2*x*y(x)^2-x^3=0,y(x), singsol=all)
 

\begin{align*} y \left (x \right ) = \sqrt {x^{2}+c_{1}} \\ y \left (x \right ) = -\sqrt {x^{2}+c_{1}} \\ y \left (x \right ) = \sqrt {x^{2} c_{1} +1}\, x \\ y \left (x \right ) = -\sqrt {x^{2} c_{1} +1}\, x \\ \end{align*}

Solution by Mathematica

Time used: 0.566 (sec). Leaf size: 85

DSolve[-x^3 + 2*x*y[x]^2 - 2*y[x]^3*y'[x] + x*y[x]^2*y'[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to -\sqrt {x^2+2 c_1} \\ y(x)\to \sqrt {x^2+2 c_1} \\ y(x)\to -\sqrt {x^2+c_1 x^4} \\ y(x)\to \sqrt {x^2+c_1 x^4} \\ y(x)\to -x \\ y(x)\to x \\ \end{align*}