29.10.2 problem 268

Internal problem ID [4868]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 10
Problem number : 268
Date solved : Sunday, March 30, 2025 at 04:07:58 AM
CAS classification : [[_homogeneous, `class G`], _rational, _Riccati]

\begin{align*} x^{2} y^{\prime }&=a +b x y+c \,x^{2} y^{2} \end{align*}

✓ Maple. Time used: 0.005 (sec). Leaf size: 59

ode:=x^2*diff(y(x),x) = a+b*x*y(x)+c*x^2*y(x)^2; 
dsolve(ode,y(x), singsol=all);
 

\[ y = \frac {-1-b +\tan \left (\frac {\sqrt {4 a c -b^{2}-2 b -1}\, \left (\ln \left (x \right )-c_1 \right )}{2}\right ) \sqrt {4 a c -b^{2}-2 b -1}}{2 c x} \]

✓ Mathematica. Time used: 0.267 (sec). Leaf size: 99

ode=x^2 D[y[x],x]==a+b x y[x]+c x^2 y[x]^2; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)\to -\frac {\sqrt {-4 a c+b^2+2 b+1} \left (1-\frac {2 c_1}{x^{\sqrt {-4 a c+b^2+2 b+1}}+c_1}\right )+b+1}{2 c x} \\ y(x)\to -\frac {-\sqrt {-4 a c+b^2+2 b+1}+b+1}{2 c x} \\ \end{align*}

✓ Sympy. Time used: 0.254 (sec). Leaf size: 48

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

\[ y{\left (x \right )} = - \frac {b - \sqrt {4 a c - \left (b + 1\right )^{2}} \tan {\left (C_{1} + \frac {\sqrt {4 a c - \left (b + 1\right )^{2}} \log {\left (x \right )}}{2} \right )} + 1}{2 c x} \]