36.2.14 problem 14

Internal problem ID [6307]
Book : Fundamentals of Differential Equations. By Nagle, Saff and Snider. 9th edition. Boston. Pearson 2018.
Section : Chapter 2, First order differential equations. Section 2.3, Linear equations. Exercises. page 54
Problem number : 14
Date solved : Wednesday, March 05, 2025 at 12:33:34 AM
CAS classification : [_linear]

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

✓ Maple. Time used: 0.001 (sec). Leaf size: 22

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

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

✓ Mathematica. Time used: 0.041 (sec). Leaf size: 31

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

\[ y(x)\to \frac {-3 x^5+5 \sin (x)-5 x \cos (x)+5 c_1}{5 x^3} \]

✓ Sympy. Time used: 0.710 (sec). Leaf size: 27

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

\[ y{\left (x \right )} = \frac {C_{1}}{x^{3}} - \frac {3 x^{2}}{5} - \frac {\cos {\left (x \right )}}{x^{2}} + \frac {\sin {\left (x \right )}}{x^{3}} \]