4.8 problem 8

Internal problem ID [12324]

Book: Ordinary Differential Equations by Charles E. Roberts, Jr. CRC Press. 2010
Section: Chapter 2. The Initial Value Problem. Exercises 2.2, page 53
Problem number: 8.
ODE order: 1.
ODE degree: 1.

CAS Maple gives this as type [_separable]

\[ \boxed {y^{\prime }-\frac {\sqrt {y}}{x}=0} \]

Solution by Maple

Time used: 0.0 (sec). Leaf size: 15

dsolve(diff(y(x),x)=sqrt(y(x))/x,y(x), singsol=all)
 

\[ \sqrt {y \left (x \right )}-\frac {\ln \left (x \right )}{2}-c_{1} = 0 \]

Solution by Mathematica

Time used: 0.202 (sec). Leaf size: 21

DSolve[y'[x]==Sqrt[y[x]]/x,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to \frac {1}{4} (\log (x)+c_1){}^2 y(x)\to 0 \end{align*}