7.13 problem 188

Internal problem ID [3444]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 7
Problem number: 188.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class G`], _rational, _Bernoulli]

\[ \boxed {x y^{\prime }+y \left (1-x y^{2}\right )=0} \]

Solution by Maple

Time used: 0.016 (sec). Leaf size: 31

dsolve(x*diff(y(x),x)+(1-x*y(x)^2)*y(x) = 0,y(x), singsol=all)
 

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

Solution by Mathematica

Time used: 0.423 (sec). Leaf size: 40

DSolve[x y'[x]+(1-x y[x]^2)y[x]==0,y[x],x,IncludeSingularSolutions -> True]
 

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