2.6 problem 6

Internal problem ID [4183]

Book: A treatise on ordinary and partial differential equations by William Woolsey Johnson. 1913
Section: Chapter 2, Equations of the first order and degree. page 20
Problem number: 6.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_quadrature]

\[ \boxed {y^{\prime }+y^{2} b^{2}-a^{2}=0} \]

Solution by Maple

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

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

\[ y \left (x \right ) = -\frac {a \left ({\mathrm e}^{-2 a b c_{1} -2 x b a}+1\right )}{b \left ({\mathrm e}^{-2 a b c_{1} -2 x b a}-1\right )} \]

Solution by Mathematica

Time used: 3.193 (sec). Leaf size: 37

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

\begin{align*} y(x)\to \frac {a \tanh (a b (x+c_1))}{b} \\ y(x)\to -\frac {a}{b} \\ y(x)\to \frac {a}{b} \\ \end{align*}