3.14 problem 68

Internal problem ID [3332]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 3
Problem number: 68.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

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

Solution by Maple

Time used: 0.0 (sec). Leaf size: 35

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

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

Solution by Mathematica

Time used: 0.306 (sec). Leaf size: 78

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

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