1.439 problem 440

Internal problem ID [8019]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 440.
ODE order: 1.
ODE degree: 2.

CAS Maple gives this as type [_separable]

\[ \boxed {x^{2} {y^{\prime }}^{2}+4 y x y^{\prime }-5 y^{2}=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 15

dsolve(x^2*diff(y(x),x)^2+4*x*y(x)*diff(y(x),x)-5*y(x)^2 = 0,y(x), singsol=all)
 

\begin{align*} y \left (x \right ) = x c_{1} \\ y \left (x \right ) = \frac {c_{1}}{x^{5}} \\ \end{align*}

Solution by Mathematica

Time used: 0.041 (sec). Leaf size: 24

DSolve[-5*y[x]^2 + 4*x*y[x]*y'[x] + x^2*y'[x]^2==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to \frac {c_1}{x^5} \\ y(x)\to c_1 x \\ y(x)\to 0 \\ \end{align*}