29.34.6 problem 1001
Internal
problem
ID
[5577]
Book
:
Ordinary
differential
equations
and
their
solutions.
By
George
Moseley
Murphy.
1960
Section
:
Various
34
Problem
number
:
1001
Date
solved
:
Sunday, March 30, 2025 at 09:04:00 AM
CAS
classification
:
[_rational]
\begin{align*} x y^{2} {y^{\prime }}^{2}+\left (a -x^{3}-y^{3}\right ) y^{\prime }+x^{2} y&=0 \end{align*}
✓ Maple. Time used: 0.241 (sec). Leaf size: 247
ode:=x*y(x)^2*diff(y(x),x)^2+(a-x^3-y(x)^3)*diff(y(x),x)+x^2*y(x) = 0;
dsolve(ode,y(x), singsol=all);
\begin{align*}
y &= \left (x^{3}+a -2 x \sqrt {a x}\right )^{{1}/{3}} \\
y &= \left (x^{3}+a +2 x \sqrt {a x}\right )^{{1}/{3}} \\
y &= -\frac {\left (x^{3}+a -2 x \sqrt {a x}\right )^{{1}/{3}} \left (1+i \sqrt {3}\right )}{2} \\
y &= \frac {\left (x^{3}+a -2 x \sqrt {a x}\right )^{{1}/{3}} \left (-1+i \sqrt {3}\right )}{2} \\
y &= -\frac {\left (x^{3}+a +2 x \sqrt {a x}\right )^{{1}/{3}} \left (1+i \sqrt {3}\right )}{2} \\
y &= \frac {\left (x^{3}+a +2 x \sqrt {a x}\right )^{{1}/{3}} \left (-1+i \sqrt {3}\right )}{2} \\
y &= 0 \\
\int _{\textit {\_b}}^{y}\frac {\textit {\_a}^{2}}{\sqrt {\textit {\_a}^{6}+\left (-2 x^{3}-2 a \right ) \textit {\_a}^{3}+\left (-x^{3}+a \right )^{2}}}d \textit {\_a} +\frac {\ln \left (x \right )}{2}-c_1 &= 0 \\
\int _{\textit {\_b}}^{y}\frac {\textit {\_a}^{2}}{\sqrt {\textit {\_a}^{6}+\left (-2 x^{3}-2 a \right ) \textit {\_a}^{3}+\left (-x^{3}+a \right )^{2}}}d \textit {\_a} -\frac {\ln \left (x \right )}{2}-c_1 &= 0 \\
\end{align*}
✓ Mathematica. Time used: 0.684 (sec). Leaf size: 194
ode=x y[x]^2 (D[y[x],x])^2 +(a-x^3-y[x]^3) D[y[x],x]+x^2 y[x]==0;
ic={};
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
\begin{align*}
y(x)\to \frac {\sqrt [3]{a+(-1+c_1) x^3}}{\sqrt [3]{1-\frac {1}{c_1}}} \\
y(x)\to 0 \\
y(x)\to \sqrt [3]{\left (\sqrt {a}-x^{3/2}\right )^2} \\
y(x)\to -\sqrt [3]{-1} \sqrt [3]{\left (\sqrt {a}-x^{3/2}\right )^2} \\
y(x)\to (-1)^{2/3} \sqrt [3]{\left (\sqrt {a}-x^{3/2}\right )^2} \\
y(x)\to \sqrt [3]{\left (\sqrt {a}+x^{3/2}\right )^2} \\
y(x)\to -\sqrt [3]{-1} \sqrt [3]{\left (\sqrt {a}+x^{3/2}\right )^2} \\
y(x)\to (-1)^{2/3} \sqrt [3]{\left (\sqrt {a}+x^{3/2}\right )^2} \\
\end{align*}
✗ Sympy
from sympy import *
x = symbols("x")
a = symbols("a")
y = Function("y")
ode = Eq(x**2*y(x) + x*y(x)**2*Derivative(y(x), x)**2 + (a - x**3 - y(x)**3)*Derivative(y(x), x),0)
ics = {}
dsolve(ode,func=y(x),ics=ics)
Timed Out