56.1.12 problem 12

Internal problem ID [8724]
Book : Own collection of miscellaneous problems
Section : section 1.0
Problem number : 12
Date solved : Sunday, March 30, 2025 at 01:25:02 PM
CAS classification : [_separable]

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

With initial conditions

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

✓ Maple. Time used: 0.039 (sec). Leaf size: 9

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

\[ y = c_1 \,x^{2} \]

✓ Mathematica. Time used: 0.002 (sec). Leaf size: 6

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

\[ y(x)\to 0 \]

✗ Sympy

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

ValueError : Couldnt solve for initial conditions