Internal problem ID [2114]
Book: Differential equations and linear algebra, Stephen W. Goode and Scott A Annin. Fourth edition,
2015
Section: Chapter 1, First-Order Differential Equations. Section 1.4, Separable Differential Equations.
page 43
Problem number: Problem 2.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_separable]
Solve \begin {gather*} \boxed {y^{\prime }-\frac {y^{2}}{x^{2}+1}=0} \end {gather*}
✓ Solution by Maple
Time used: 0.015 (sec). Leaf size: 14
dsolve(diff(y(x),x)=y(x)^2/(x^2+1),y(x), singsol=all)
\[ y \relax (x ) = -\frac {1}{\arctan \relax (x )-c_{1}} \]
✓ Solution by Mathematica
Time used: 0.144 (sec). Leaf size: 19
DSolve[y'[x]==y[x]^2/(x^2+1),y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to -\frac {1}{\text {ArcTan}(x)+c_1} \\ y(x)\to 0 \\ \end{align*}