30.17 problem 876

Internal problem ID [4113]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 30
Problem number: 876.
ODE order: 1.
ODE degree: 2.

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

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

Solution by Maple

Time used: 0.093 (sec). Leaf size: 53

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

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

Solution by Mathematica

Time used: 0.063 (sec). Leaf size: 57

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

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