13.9.1 problem 1

Internal problem ID [2387]
Book : Differential equations and their applications, 3rd ed., M. Braun
Section : Section 2.2.2, Equal roots, reduction of order. Page 147
Problem number : 1
Date solved : Monday, January 27, 2025 at 05:51:16 AM
CAS classification : [[_2nd_order, _missing_x]]

\begin{align*} y^{\prime \prime }-6 y^{\prime }+9 y&=0 \end{align*}

✓ Solution by Maple

Time used: 0.003 (sec). Leaf size: 14

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

\[ y = {\mathrm e}^{3 t} \left (c_2 t +c_1 \right ) \]

✓ Solution by Mathematica

Time used: 0.019 (sec). Leaf size: 18

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

\[ y(t)\to e^{3 t} (c_2 t+c_1) \]