1.44 problem 44

Internal problem ID [7088]

Book: Own collection of miscellaneous problems
Section: section 1.0
Problem number: 44.
ODE order: 1.
ODE degree: 2.

CAS Maple gives this as type [[_homogeneous, `class A`], _rational, _dAlembert]

\[ \boxed {y-x {y^{\prime }}^{2}=0} \]

Solution by Maple

Time used: 0.031 (sec). Leaf size: 39

dsolve(y(x)=x*(diff(y(x),x))^2,y(x), singsol=all)
 

\begin{align*} y \left (x \right ) = 0 y \left (x \right ) = \frac {\left (x +\sqrt {c_{1} x}\right )^{2}}{x} y \left (x \right ) = \frac {\left (-x +\sqrt {c_{1} x}\right )^{2}}{x} \end{align*}

Solution by Mathematica

Time used: 0.053 (sec). Leaf size: 46

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

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