Internal problem ID [10945]
Book: APPLIED DIFFERENTIAL EQUATIONS The Primary Course by Vladimir A. Dobrushkin.
CRC Press 2015
Section: Chapter 5.5 Laplace transform. Homogeneous equations. Problems page 357
Problem number: Problem 12.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _missing_x]]
\[ \boxed {y^{\prime \prime }+6 y^{\prime }+9 y=0} \] With initial conditions \begin {align*} [y \left (0\right ) = 1, y^{\prime }\left (0\right ) = -3] \end {align*}
✓ Solution by Maple
Time used: 0.016 (sec). Leaf size: 8
dsolve([diff(y(t),t$2)+6*diff(y(t),t)+9*y(t)=0,y(0) = 1, D(y)(0) = -3],y(t), singsol=all)
\[ y \left (t \right ) = {\mathrm e}^{-3 t} \]
✓ Solution by Mathematica
Time used: 0.003 (sec). Leaf size: 10
DSolve[{y''[t]+6*y'[t]+9*y[t]==0,{y[0]==1,y'[0]==-3}},y[t],t,IncludeSingularSolutions -> True]
\begin{align*} y(t)\to e^{-3 t} \\ \end{align*}