71.4.23 problem 23

Internal problem ID [14395]
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 : 23
Date solved : Tuesday, January 28, 2025 at 06:29:35 AM
CAS classification : [_separable]

\begin{align*} y^{\prime }&=-x \sqrt {1-y^{2}} \end{align*}

With initial conditions

\begin{align*} y \left (0\right )&=1 \end{align*}

✓ Solution by Maple

Time used: 0.004 (sec). Leaf size: 5

dsolve([diff(y(x),x)=-x*sqrt(1-y(x)^2),y(0) = 1],y(x), singsol=all)
 

\[ y = 1 \]

✓ Solution by Mathematica

Time used: 0.002 (sec). Leaf size: 6

DSolve[{D[y[x],x]==-x*Sqrt[1-y[x]^2],{y[0]==1}},y[x],x,IncludeSingularSolutions -> True]
 

\[ y(x)\to 1 \]