29.32 problem 854

Internal problem ID [3585]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 29
Problem number: 854.
ODE order: 1.
ODE degree: 2.

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

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

Solution by Maple

Time used: 0.219 (sec). Leaf size: 21

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

\begin{align*} y \relax (x ) = c_{1} x +\frac {a}{c_{1}} \\ y \relax (x ) = c_{1} \sqrt {x} \\ \end{align*}

Solution by Mathematica

Time used: 0.013 (sec). Leaf size: 53

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

\begin{align*} y(x)\to \frac {a}{c_1}+c_1 x \\ y(x)\to \text {Indeterminate} \\ y(x)\to -2 \sqrt {a} \sqrt {x} \\ y(x)\to 2 \sqrt {a} \sqrt {x} \\ \end{align*}