1.261 problem 262

Internal problem ID [8598]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 262.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class A`], _rational, [_Abel, `2nd type`, `class C`], _dAlembert]

\[ \boxed {\left (2 x^{2} y-x^{3}\right ) y^{\prime }+y^{3}-4 x y^{2}=-2 x^{3}} \]

Solution by Maple

Time used: 0.297 (sec). Leaf size: 75

dsolve((2*x^2*y(x)-x^3)*diff(y(x),x)+y(x)^3-4*x*y(x)^2+2*x^3=0,y(x), singsol=all)
 

\begin{align*} y \left (x \right ) = \frac {\left (3 x^{2} c_{1} -\sqrt {3 x^{2} c_{1} +1}-1\right ) x}{x^{2} c_{1} -1}-x y \left (x \right ) = \frac {\left (3 x^{2} c_{1} +\sqrt {3 x^{2} c_{1} +1}-1\right ) x}{x^{2} c_{1} -1}-x \end{align*}

Solution by Mathematica

Time used: 14.03 (sec). Leaf size: 132

DSolve[(2*x^2*y[x]-x^3)*y'[x]+y[x]^3-4*x*y[x]^2+2*x^3==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to \frac {2 x^3-\sqrt {e^{2 c_1} x^2 \left (-3 x^2+e^{2 c_1}\right )}}{x^2+e^{2 c_1}} y(x)\to \frac {2 x^3+\sqrt {e^{2 c_1} x^2 \left (-3 x^2+e^{2 c_1}\right )}}{x^2+e^{2 c_1}} y(x)\to 2 x y(x)\to -\sqrt {x^2} y(x)\to \sqrt {x^2} \end{align*}