11.18 problem 309

Internal problem ID [3057]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 11
Problem number: 309.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

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

Solution by Maple

Time used: 0.016 (sec). Leaf size: 21

dsolve((a^2+x^2)*diff(y(x),x)+x*y(x)+b*x*y(x)^2 = 0,y(x), singsol=all)
 

\[ y \relax (x ) = \frac {1}{\sqrt {a^{2}+x^{2}}\, c_{1}-b} \]

Solution by Mathematica

Time used: 3.911 (sec). Leaf size: 43

DSolve[(x^2+a^2)y'[x]+x y[x]+b x y[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
 

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