2.29 problem 54

Internal problem ID [3318]

Book: Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section: Various 2
Problem number: 54.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_quadrature]

\[ \boxed {y^{\prime }-b y^{2}=a} \]

Solution by Maple

Time used: 0.016 (sec). Leaf size: 23

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

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

Solution by Mathematica

Time used: 9.091 (sec). Leaf size: 68

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

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