21.18 problem 594

Internal problem ID [3844]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 21
Problem number: 594.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

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

Solution by Maple

Time used: 0.0 (sec). Leaf size: 27

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

\[ \frac {x^{2}}{2}-\frac {y \left (x \right )^{2}}{2}-2 y \left (x \right )-4 \ln \left (y \left (x \right )-2\right )+c_{1} = 0 \]

Solution by Mathematica

Time used: 0.307 (sec). Leaf size: 43

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

\begin{align*} y(x)\to \text {InverseFunction}\left [\frac {\text {$\#$1}^2}{2}+2 \text {$\#$1}+4 \log (\text {$\#$1}-2)-6\&\right ]\left [\frac {x^2}{2}+c_1\right ] y(x)\to 2 \end{align*}