50.14.4 problem 1(d)

Internal problem ID [8042]
Book : Differential Equations: Theory, Technique, and Practice by George Simmons, Steven Krantz. McGraw-Hill NY. 2007. 1st Edition.
Section : Chapter 2. Problems for Review and Discovery. Drill excercises. Page 105
Problem number : 1(d)
Date solved : Sunday, March 30, 2025 at 12:41:12 PM
CAS classification : [[_2nd_order, _missing_x]]

\begin{align*} y^{\prime \prime }-y^{\prime }+6 y&=0 \end{align*}

✓ Maple. Time used: 0.002 (sec). Leaf size: 28

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

\[ y = {\mathrm e}^{\frac {x}{2}} \left (c_1 \sin \left (\frac {\sqrt {23}\, x}{2}\right )+c_2 \cos \left (\frac {\sqrt {23}\, x}{2}\right )\right ) \]

✓ Mathematica. Time used: 0.022 (sec). Leaf size: 42

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

\[ y(x)\to e^{x/2} \left (c_2 \cos \left (\frac {\sqrt {23} x}{2}\right )+c_1 \sin \left (\frac {\sqrt {23} x}{2}\right )\right ) \]

✓ Sympy. Time used: 0.168 (sec). Leaf size: 31

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

\[ y{\left (x \right )} = \left (C_{1} \sin {\left (\frac {\sqrt {23} x}{2} \right )} + C_{2} \cos {\left (\frac {\sqrt {23} x}{2} \right )}\right ) e^{\frac {x}{2}} \]