Internal problem ID [4945]
Book: Fundamentals of Differential Equations. By Nagle, Saff and Snider. 9th edition. Boston.
Pearson 2018.
Section: Chapter 2, First order differential equations. Section 2.2, Separable Equations. Exercises.
page 46
Problem number: 31 part(a).
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_separable]
\[ \boxed {y^{\prime }-x y^{3}=0} \]
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 27
dsolve(diff(y(x),x)=x*y(x)^3,y(x), singsol=all)
\begin{align*} y \left (x \right ) = \frac {1}{\sqrt {-x^{2}+c_{1}}} y \left (x \right ) = -\frac {1}{\sqrt {-x^{2}+c_{1}}} \end{align*}
✓ Solution by Mathematica
Time used: 0.146 (sec). Leaf size: 44
DSolve[y'[x]==x*y[x]^3,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to -\frac {1}{\sqrt {-x^2-2 c_1}} y(x)\to \frac {1}{\sqrt {-x^2-2 c_1}} y(x)\to 0 \end{align*}