83.11.1 problem 1

Internal problem ID [21990]
Book : Differential Equations By Kaj L. Nielsen. Second edition 1966. Barnes and nobel. 66-28306
Section : Chapter VI. Linear equations with constant coefficients. Ex. XIII at page 106
Problem number : 1
Date solved : Thursday, October 02, 2025 at 08:21:29 PM
CAS classification : [[_2nd_order, _missing_x]]

\begin{align*} y^{\prime \prime }-12 y^{\prime }+35 y&=0 \end{align*}

✓ Maple. Time used: 0.002 (sec). Leaf size: 17

ode:=diff(diff(y(x),x),x)-12*diff(y(x),x)+35*y(x) = 0; 
dsolve(ode,y(x), singsol=all);
 

\[ y = \left (c_1 +c_2 \,{\mathrm e}^{2 x}\right ) {\mathrm e}^{5 x} \]

✓ Mathematica. Time used: 0.02 (sec). Leaf size: 22

ode=D[y[x],{x,2}]-12*D[y[x],x]+35*y[x]==0; 
ic={}; 
DSolve[{ode,ic},y[x],x,IncludeSingularSolutions->True]
 

\begin{align*} y(x)&\to e^{5 x} \left (c_2 e^{2 x}+c_1\right ) \end{align*}

✓ Sympy. Time used: 0.090 (sec). Leaf size: 15

from sympy import * 
x = symbols("x") 
y = Function("y") 
ode = Eq(35*y(x) - 12*Derivative(y(x), x) + Derivative(y(x), (x, 2)),0) 
ics = {} 
dsolve(ode,func=y(x),ics=ics)
 

\[ y{\left (x \right )} = \left (C_{1} + C_{2} e^{2 x}\right ) e^{5 x} \]