18.4 problem section 9.2, problem 4

Internal problem ID [1468]

Book: Elementary differential equations with boundary value problems. William F. Trench. Brooks/Cole 2001
Section: Chapter 9 Introduction to Linear Higher Order Equations. Section 9.2. constant coefficient. Page 483
Problem number: section 9.2, problem 4.
ODE order: 3.
ODE degree: 1.

CAS Maple gives this as type [[_3rd_order, _missing_x]]

Solve \begin {gather*} \boxed {2 y^{\prime \prime \prime }+3 y^{\prime \prime }-2 y^{\prime }-3 y=0} \end {gather*}

Solution by Maple

Time used: 0.016 (sec). Leaf size: 21

dsolve(2*diff(y(x),x$3)+3*diff(y(x),x$2)-2*diff(y(x),x)-3*y(x)=0,y(x), singsol=all)
 

\[ y \relax (x ) = {\mathrm e}^{-x} c_{1}+c_{2} {\mathrm e}^{-\frac {3 x}{2}}+c_{3} {\mathrm e}^{x} \]

Solution by Mathematica

Time used: 0.003 (sec). Leaf size: 30

DSolve[2*y'''[x]+3*y''[x]-2*y'[x]-3*y[x]==0,y[x],x,IncludeSingularSolutions -> True]
 

\begin{align*} y(x)\to c_1 e^{-3 x/2}+c_2 e^{-x}+c_3 e^x \\ \end{align*}