19.4 problem 517

Internal problem ID [3769]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 19
Problem number: 517.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class G`], _rational, [_Abel, `2nd type`, `class B`]]

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

Solution by Maple

Time used: 0.0 (sec). Leaf size: 14

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

\[ y \left (x \right ) = {\mathrm e}^{-\operatorname {LambertW}\left (x \,{\mathrm e}^{c_{1}}\right )+c_{1}} \]

Solution by Mathematica

Time used: 1.751 (sec). Leaf size: 21

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

\begin{align*} y(x)\to \frac {W\left (e^{c_1} x\right )}{x} y(x)\to 0 \end{align*}