Internal problem ID [5835]
Book: THEORY OF DIFFERENTIAL EQUATIONS IN ENGINEERING AND MECHANICS.
K.T. CHAU, CRC Press. Boca Raton, FL. 2018
Section: Chapter 3. Ordinary Differential Equations. Section 3.2 FIRST ORDER ODE. Page
114
Problem number: Example 3.2.
ODE order: 1.
ODE degree: 1.
CAS Maple gives this as type [_separable]
\[ \boxed {y^{\prime }-\frac {x^{2}}{1-y^{2}}=0} \]
✓ Solution by Maple
Time used: 0.016 (sec). Leaf size: 268
dsolve(diff(y(x),x)=x^2/(1-y(x)^2),y(x), singsol=all)
\begin{align*} y \left (x \right ) &= \frac {\left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {2}{3}}+4}{2 \left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {1}{3}}} \\ y \left (x \right ) &= -\frac {\left (1+i \sqrt {3}\right ) \left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {2}{3}}-4 i \sqrt {3}+4}{4 \left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {1}{3}}} \\ y \left (x \right ) &= \frac {i \left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {2}{3}} \sqrt {3}-4 i \sqrt {3}-\left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {2}{3}}-4}{4 \left (-4 x^{3}-12 c_{1} +4 \sqrt {x^{6}+6 c_{1} x^{3}+9 c_{1}^{2}-4}\right )^{\frac {1}{3}}} \\ \end{align*}
✓ Solution by Mathematica
Time used: 2.485 (sec). Leaf size: 320
DSolve[y'[x]==x^2/(1-y[x]^2),y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to \frac {\sqrt [3]{-x^3+\sqrt {x^6-6 c_1 x^3-4+9 c_1{}^2}+3 c_1}}{\sqrt [3]{2}}+\frac {\sqrt [3]{2}}{\sqrt [3]{-x^3+\sqrt {x^6-6 c_1 x^3-4+9 c_1{}^2}+3 c_1}} \\ y(x)\to \frac {i \left (\sqrt {3}+i\right ) \sqrt [3]{-x^3+\sqrt {x^6-6 c_1 x^3-4+9 c_1{}^2}+3 c_1}}{2 \sqrt [3]{2}}-\frac {1+i \sqrt {3}}{2^{2/3} \sqrt [3]{-x^3+\sqrt {x^6-6 c_1 x^3-4+9 c_1{}^2}+3 c_1}} \\ y(x)\to \frac {i \left (\sqrt {3}+i\right )}{2^{2/3} \sqrt [3]{-x^3+\sqrt {x^6-6 c_1 x^3-4+9 c_1{}^2}+3 c_1}}-\frac {\left (1+i \sqrt {3}\right ) \sqrt [3]{-x^3+\sqrt {x^6-6 c_1 x^3-4+9 c_1{}^2}+3 c_1}}{2 \sqrt [3]{2}} \\ \end{align*}