1.31 problem 31

Internal problem ID [8368]

Book: Differential Gleichungen, E. Kamke, 3rd ed. Chelsea Pub. NY, 1948
Section: Chapter 1, linear first order
Problem number: 31.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

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

Solution by Maple

Time used: 0.015 (sec). Leaf size: 22

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

\[ y \left (x \right ) = \tan \left (\frac {a \left (c_{1} n +x^{1+n}+c_{1} \right )}{1+n}\right ) \]

Solution by Mathematica

Time used: 0.365 (sec). Leaf size: 35

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

\begin{align*} y(x)\to \tan \left (\frac {a x^{n+1}}{n+1}+c_1\right ) y(x)\to -i y(x)\to i \end{align*}