76.2.32 problem 40

Internal problem ID [17289]
Book : Differential equations. An introduction to modern methods and applications. James Brannan, William E. Boyce. Third edition. Wiley 2015
Section : Chapter 2. First order differential equations. Section 2.2 (Linear equations: Method of integrating factors). Problems at page 54
Problem number : 40
Date solved : Thursday, March 13, 2025 at 09:23:57 AM
CAS classification : [[_linear, `class A`]]

\begin{align*} y^{\prime }-6 y&=t^{6} {\mathrm e}^{6 t} \end{align*}

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

ode:=diff(y(t),t)-6*y(t) = t^6*exp(6*t); 
dsolve(ode,y(t), singsol=all);
 

\[ y = \frac {\left (t^{7}+7 c_{1} \right ) {\mathrm e}^{6 t}}{7} \]

✓ Mathematica. Time used: 0.052 (sec). Leaf size: 22

ode=D[y[t],t]-6*y[t]==t^6*Exp[6*t]; 
ic={}; 
DSolve[{ode,ic},y[t],t,IncludeSingularSolutions->True]
 

\[ y(t)\to \frac {1}{7} e^{6 t} \left (t^7+7 c_1\right ) \]

✓ Sympy. Time used: 0.232 (sec). Leaf size: 14

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

\[ y{\left (t \right )} = \left (C_{1} + \frac {t^{7}}{7}\right ) e^{6 t} \]