20.1.27 problem Problem 35

Internal problem ID [3584]
Book : Differential equations and linear algebra, Stephen W. Goode and Scott A Annin. Fourth edition, 2015
Section : Chapter 1, First-Order Differential Equations. Section 1.2, Basic Ideas and Terminology. page 21
Problem number : Problem 35
Date solved : Sunday, March 30, 2025 at 01:53:24 AM
CAS classification : [[_2nd_order, _quadrature]]

\begin{align*} y^{\prime \prime }&=x \,{\mathrm e}^{x} \end{align*}

✓ Maple. Time used: 0.002 (sec). Leaf size: 15

ode:=diff(diff(y(x),x),x) = x*exp(x); 
dsolve(ode,y(x), singsol=all);
 

\[ y = \left (x -2\right ) {\mathrm e}^{x}+c_1 x +c_2 \]

✓ Mathematica. Time used: 0.013 (sec). Leaf size: 19

ode=D[y[x],{x,2}]==x*Exp[x]; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to e^x (x-2)+c_2 x+c_1 \]

✓ Sympy. Time used: 0.063 (sec). Leaf size: 15

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

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