84.8.2 problem 4.11

Internal problem ID [22114]
Book : Schaums outline series. Differential Equations By Richard Bronson. 1973. McGraw-Hill Inc. ISBN 0-07-008009-7
Section : Chapter 4. Separable first-order differential equations. Supplementary problems
Problem number : 4.11
Date solved : Thursday, October 02, 2025 at 08:25:21 PM
CAS classification : [_separable]

\begin{align*} \frac {1}{x}-\frac {y^{\prime }}{y}&=0 \end{align*}

✓ Maple. Time used: 0.000 (sec). Leaf size: 7

ode:=1/x-1/y(x)*diff(y(x),x) = 0; 
dsolve(ode,y(x), singsol=all);
 

\[ y = c_1 x \]

✓ Mathematica. Time used: 0.015 (sec). Leaf size: 9

ode=1/x-1/y[x]*D[y[x],x]==0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)&\to c_1 x \end{align*}

✓ Sympy. Time used: 0.062 (sec). Leaf size: 5

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

\[ y{\left (x \right )} = C_{1} x \]