29.20.22 problem 569

Internal problem ID [5163]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 20
Problem number : 569
Date solved : Sunday, March 30, 2025 at 06:46:19 AM
CAS classification : [[_homogeneous, `class G`], _rational, [_Abel, `2nd type`, `class C`]]

\begin{align*} x \left (2-x y\right ) y^{\prime }+2 y-x y^{2} \left (1+x y\right )&=0 \end{align*}

✓ Maple. Time used: 0.003 (sec). Leaf size: 59

ode:=x*(2-x*y(x))*diff(y(x),x)+2*y(x)-x*y(x)^2*(1+x*y(x)) = 0; 
dsolve(ode,y(x), singsol=all);
 

\begin{align*} y &= \frac {-1+\sqrt {1-4 \ln \left (x \right )+4 c_1}}{2 x \left (-\ln \left (x \right )+c_1 \right )} \\ y &= \frac {1+\sqrt {1-4 \ln \left (x \right )+4 c_1}}{2 \left (\ln \left (x \right )-c_1 \right ) x} \\ \end{align*}

✓ Mathematica. Time used: 1.161 (sec). Leaf size: 86

ode=x(2-x y[x])D[y[x],x]+2 y[x]-x y[x]^2(1+x y[x])==0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)\to \frac {2}{x+\sqrt {-\frac {1}{x^3}} x^2 \sqrt {-x (-4 \log (x)+1+4 c_1)}} \\ y(x)\to \frac {2}{x+\left (-\frac {1}{x^3}\right )^{3/2} x^5 \sqrt {-x (-4 \log (x)+1+4 c_1)}} \\ y(x)\to 0 \\ \end{align*}

✓ Sympy. Time used: 1.125 (sec). Leaf size: 51

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(x*(-x*y(x) + 2)*Derivative(y(x), x) - x*(x*y(x) + 1)*y(x)**2 + 2*y(x),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ \left [ y{\left (x \right )} = \frac {1 - \sqrt {- 4 C_{1} - 4 \log {\left (x \right )} + 1}}{2 x \left (C_{1} + \log {\left (x \right )}\right )}, \ y{\left (x \right )} = \frac {\sqrt {- 4 C_{1} - 4 \log {\left (x \right )} + 1} + 1}{2 x \left (C_{1} + \log {\left (x \right )}\right )}\right ] \]