11.28 problem 319

Internal problem ID [3067]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 11
Problem number: 319.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

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

Solution by Maple

Time used: 0.003 (sec). Leaf size: 32

dsolve(x*(a+x)*diff(y(x),x) = (b+c*y(x))*y(x),y(x), singsol=all)
 

\[ y \relax (x ) = \frac {b}{\left (a +x \right )^{\frac {b}{a}} x^{-\frac {b}{a}} c_{1} b -c} \]

Solution by Mathematica

Time used: 0.819 (sec). Leaf size: 53

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

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