19.2.14 problem 14

Internal problem ID [3543]
Book : Differential equations and linear algebra, Stephen W. Goode, second edition, 2000
Section : 1.6, page 50
Problem number : 14
Date solved : Tuesday, March 04, 2025 at 04:45:09 PM
CAS classification : [_quadrature]

\begin{align*} y^{\prime }+\frac {m}{x}&=\ln \left (x \right ) \end{align*}

✓ Maple. Time used: 0.001 (sec). Leaf size: 17

ode:=diff(y(x),x)+m/x = ln(x); 
dsolve(ode,y(x), singsol=all);
 

\[ y \left (x \right ) = \left (-m +x \right ) \ln \left (x \right )+c_{1} -x \]

✓ Mathematica. Time used: 0.004 (sec). Leaf size: 19

ode=D[y[x],x]+m/x==Log[x]; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to (x-m) \log (x)-x+c_1 \]

✓ Sympy. Time used: 0.140 (sec). Leaf size: 15

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

\[ y{\left (x \right )} = C_{1} - m \log {\left (x \right )} + x \log {\left (x \right )} - x \]