1.142 problem 143

Internal problem ID [7722]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 143.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [[_homogeneous, `class G`], _rational, [_Riccati, _special]]

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

Solution by Maple

Time used: 0.016 (sec). Leaf size: 40

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

\[ y \left (x \right ) = -\frac {-1+\tanh \left (\frac {\sqrt {4 b a +1}\, \left (-\ln \left (x \right )+c_{1} \right )}{2}\right ) \sqrt {4 b a +1}}{2 a x} \]

Solution by Mathematica

Time used: 0.195 (sec). Leaf size: 77

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

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