40.13.15 problem 36

Internal problem ID [6769]
Book : Schaums Outline. Theory and problems of Differential Equations, 1st edition. Frank Ayres. McGraw Hill 1952
Section : Chapter 18. Linear equations with variable coefficients (Equations of second order). Supplemetary problems. Page 120
Problem number : 36
Date solved : Wednesday, March 05, 2025 at 02:45:19 AM
CAS classification : [[_2nd_order, _with_linear_symmetries]]

\begin{align*} x^{2} y^{\prime \prime }-4 x y^{\prime }+\left (9 x^{2}+6\right ) y&=0 \end{align*}

✓ Maple. Time used: 0.003 (sec). Leaf size: 21

ode:=x^2*diff(diff(y(x),x),x)-4*x*diff(y(x),x)+(9*x^2+6)*y(x) = 0; 
dsolve(ode,y(x), singsol=all);
 

\[ y = x^{2} \left (c_1 \sin \left (3 x \right )+c_2 \cos \left (3 x \right )\right ) \]

✓ Mathematica. Time used: 0.056 (sec). Leaf size: 37

ode=x^2*D[y[x],{x,2}]-4*x*D[y[x],x]+(6+9*x^2)*y[x]==0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\[ y(x)\to \frac {1}{6} e^{-3 i x} x^2 \left (6 c_1-i c_2 e^{6 i x}\right ) \]

✓ Sympy. Time used: 0.275 (sec). Leaf size: 24

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(x**2*Derivative(y(x), (x, 2)) - 4*x*Derivative(y(x), x) + (9*x**2 + 6)*y(x),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

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