29.2.22 problem 47

Internal problem ID [4655]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 2
Problem number : 47
Date solved : Tuesday, March 04, 2025 at 07:00:36 PM
CAS classification : [[_1st_order, _with_linear_symmetries], _Riccati]

\begin{align*} y^{\prime }&=1+x \left (-x^{3}+2\right )+\left (2 x^{2}-y\right ) y \end{align*}

✓ Maple. Time used: 0.027 (sec). Leaf size: 33

ode:=diff(y(x),x) = 1+x*(-x^3+2)+(2*x^2-y(x))*y(x); 
dsolve(ode,y(x), singsol=all);
 

\[ y \left (x \right ) = \frac {\left (x^{2}+1\right ) c_{1} {\mathrm e}^{2 x}-x^{2}+1}{c_{1} {\mathrm e}^{2 x}-1} \]

✓ Mathematica. Time used: 0.155 (sec). Leaf size: 34

ode=D[y[x],x]==1+x*(2-x^3)+(2*x^2-y[x])y[x]; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)\to x^2-\frac {2}{1+2 c_1 e^{2 x}}+1 \\ y(x)\to x^2+1 \\ \end{align*}

✓ Sympy. Time used: 0.306 (sec). Leaf size: 29

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(-x*(2 - x**3) - (2*x**2 - y(x))*y(x) + Derivative(y(x), x) - 1,0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = \frac {C_{1} x^{2} - C_{1} - x^{2} e^{2 x} - e^{2 x}}{C_{1} - e^{2 x}} \]