64.5.20 problem 20

Internal problem ID [13262]
Book : Differential Equations by Shepley L. Ross. Third edition. John Willey. New Delhi. 2004.
Section : Chapter 2, section 2.3 (Linear equations). Exercises page 56
Problem number : 20
Date solved : Monday, March 31, 2025 at 07:44:10 AM
CAS classification : [_separable]

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

With initial conditions

\begin{align*} y \left (0\right )&=2 \end{align*}

✓ Maple. Time used: 0.021 (sec). Leaf size: 14

ode:=diff(y(x),x)+3*x^2*y(x) = x^2; 
ic:=y(0) = 2; 
dsolve([ode,ic],y(x), singsol=all);
 

\[ y = \frac {1}{3}+\frac {5 \,{\mathrm e}^{-x^{3}}}{3} \]

✓ Mathematica. Time used: 0.067 (sec). Leaf size: 20

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

\[ y(x)\to \frac {5 e^{-x^3}}{3}+\frac {1}{3} \]

✓ Sympy. Time used: 0.349 (sec). Leaf size: 14

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

\[ y{\left (x \right )} = \frac {1}{3} + \frac {5 e^{- x^{3}}}{3} \]