19.22 problem 535

Internal problem ID [3279]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 19
Problem number: 535.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, class G], _rational, [_Abel, 2nd type, class B]]

Solve \begin {gather*} \boxed {x \left (2 x^{3}+y\right ) y^{\prime }-\left (2 x^{3}-y\right ) y=0} \end {gather*}

Solution by Maple

Time used: 0.131 (sec). Leaf size: 49

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

\begin{align*} y \relax (x ) = \frac {c_{1} \left (c_{1}+\sqrt {4 x^{4}+c_{1}^{2}}\right )}{2 x} \\ y \relax (x ) = \frac {c_{1} \left (2 c_{1}-2 \sqrt {4 x^{4}+c_{1}^{2}}\right )}{4 x} \\ \end{align*}

Solution by Mathematica

Time used: 0.619 (sec). Leaf size: 76

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

\begin{align*} y(x)\to \frac {2 x^4}{-x+\frac {\sqrt {1+4 c_1 x^4}}{\sqrt {\frac {1}{x^2}}}} \\ y(x)\to -\frac {2 x^4}{x+\frac {\sqrt {1+4 c_1 x^4}}{\sqrt {\frac {1}{x^2}}}} \\ y(x)\to 0 \\ \end{align*}