19.21 problem 534

Internal problem ID [3277]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 19
Problem number: 534.
ODE order: 1.
ODE degree: 1.

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

\[ \boxed {x \left (y+x^{3}\right ) y^{\prime }-\left (-y+x^{3}\right ) y=0} \]

Solution by Maple

Time used: 0.219 (sec). Leaf size: 41

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

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

Solution by Mathematica

Time used: 0.744 (sec). Leaf size: 72

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

\begin{align*} y(x)\to \frac {x^3}{-1+\sqrt {\frac {1}{x^2}} x \sqrt {1+c_1 x^4}} \\ y(x)\to -\frac {x^4}{x+\frac {\sqrt {1+c_1 x^4}}{\sqrt {\frac {1}{x^2}}}} \\ y(x)\to 0 \\ \end{align*}