29.11.3 problem 294

Internal problem ID [4894]
Book : Ordinary differential equations and their solutions. By George Moseley Murphy. 1960
Section : Various 11
Problem number : 294
Date solved : Tuesday, March 04, 2025 at 07:25:58 PM
CAS classification : [_separable]

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

✓ Maple. Time used: 0.011 (sec). Leaf size: 18

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

\[ y \left (x \right ) = c_{1} \left (x^{2}+1\right )^{b} {\mathrm e}^{a \arctan \left (x \right )} \]

✓ Mathematica. Time used: 0.044 (sec). Leaf size: 26

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

\begin{align*} y(x)\to c_1 \left (x^2+1\right )^b e^{a \arctan (x)} \\ y(x)\to 0 \\ \end{align*}

✓ Sympy. Time used: 0.525 (sec). Leaf size: 39

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

\[ y{\left (x \right )} = C_{1} e^{- \frac {i a \log {\left (x - i \right )}}{2} + \frac {i a \log {\left (x + i \right )}}{2} + b \log {\left (x - i \right )} + b \log {\left (x + i \right )}} \]