73.20.6 problem 29.7 (a)

Internal problem ID [15615]
Book : Ordinary Differential Equations. An introduction to the fundamentals. Kenneth B. Howell. second edition. CRC Press. FL, USA. 2020
Section : Chapter 29. Convolution. Additional Exercises. page 523
Problem number : 29.7 (a)
Date solved : Tuesday, January 28, 2025 at 08:03:11 AM
CAS classification : [[_2nd_order, _missing_x]]

\begin{align*} y^{\prime \prime }-6 y^{\prime }+9 y&=1 \end{align*}

Using Laplace method With initial conditions

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

✓ Solution by Maple

Time used: 7.957 (sec). Leaf size: 17

dsolve([diff(y(t),t$2)-6*diff(y(t),t)+9*y(t)=1,y(0) = 0, D(y)(0) = 0],y(t), singsol=all)
 

\[ y = \frac {1}{9}+\frac {{\mathrm e}^{3 t} \left (-1+3 t \right )}{9} \]

✓ Solution by Mathematica

Time used: 0.016 (sec). Leaf size: 22

DSolve[{D[y[t],{t,2}]-6*D[y[t],t]+9*y[t]==1,{y[0]==0,Derivative[1][y][0] ==0}},y[t],t,IncludeSingularSolutions -> True]
 

\[ y(t)\to \frac {1}{9} \left (e^{3 t} (3 t-1)+1\right ) \]