29.33.11 problem 973

Internal problem ID [5550]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 33
Problem number : 973
Date solved : Sunday, March 30, 2025 at 08:35:59 AM
CAS classification : [[_1st_order, _with_linear_symmetries]]

\begin{align*} y^{2} {y^{\prime }}^{2}-6 x^{3} y^{\prime }+4 x^{2} y&=0 \end{align*}

✓ Maple. Time used: 0.111 (sec). Leaf size: 105

ode:=y(x)^2*diff(y(x),x)^2-6*x^3*diff(y(x),x)+4*x^2*y(x) = 0; 
dsolve(ode,y(x), singsol=all);
 

\begin{align*} y &= \frac {18^{{1}/{3}} x^{{4}/{3}}}{2} \\ y &= -\frac {18^{{1}/{3}} x^{{4}/{3}} \left (1+i \sqrt {3}\right )}{4} \\ y &= \frac {18^{{1}/{3}} x^{{4}/{3}} \left (i \sqrt {3}-1\right )}{4} \\ y &= 0 \\ y &= \operatorname {RootOf}\left (-4 \ln \left (x \right )-3 \int _{}^{\textit {\_Z}}\frac {4 \textit {\_a}^{3}+3 \sqrt {-4 \textit {\_a}^{3}+9}-9}{\textit {\_a} \left (4 \textit {\_a}^{3}-9\right )}d \textit {\_a} +4 c_1 \right ) x^{{4}/{3}} \\ \end{align*}

✓ Mathematica. Time used: 2.384 (sec). Leaf size: 235

ode=y[x]^2 (D[y[x],x])^2-6 x^3 D[y[x],x]+4 x^2 y[x]==0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} \text {Solve}\left [\frac {3}{4} \log (y(x))-\frac {\sqrt {9 x^6-4 x^2 y(x)^3} \text {arctanh}\left (\frac {3 x^2}{\sqrt {9 x^4-4 y(x)^3}+2 i y(x)^{3/2}}\right )}{x \sqrt {9 x^4-4 y(x)^3}}&=c_1,y(x)\right ] \\ \text {Solve}\left [\frac {3}{4} \log (y(x))+\frac {\sqrt {9 x^6-4 x^2 y(x)^3} \text {arctanh}\left (\frac {3 x^2}{\sqrt {9 x^4-4 y(x)^3}+2 i y(x)^{3/2}}\right )}{x \sqrt {9 x^4-4 y(x)^3}}&=c_1,y(x)\right ] \\ y(x)\to \left (-\frac {3}{2}\right )^{2/3} x^{4/3} \\ y(x)\to \left (\frac {3}{2}\right )^{2/3} x^{4/3} \\ y(x)\to -\sqrt [3]{-1} \left (\frac {3}{2}\right )^{2/3} x^{4/3} \\ \end{align*}

✗ Sympy

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(-6*x**3*Derivative(y(x), x) + 4*x**2*y(x) + y(x)**2*Derivative(y(x), x)**2,0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

Timed Out