82.25.2 problem Ex. 2

Internal problem ID [18872]
Book : Introductory Course On Differential Equations by Daniel A Murray. Longmans Green and Co. NY. 1924
Section : Chapter VI. Linear equations with constant coefficients. problems at page 66
Problem number : Ex. 2
Date solved : Tuesday, January 28, 2025 at 12:33:10 PM
CAS classification : [[_high_order, _missing_x]]

\begin{align*} y^{\prime \prime \prime \prime }-y^{\prime \prime \prime }-9 y^{\prime \prime }-11 y^{\prime }-4 y&=0 \end{align*}

✓ Solution by Maple

Time used: 0.003 (sec). Leaf size: 26

dsolve(diff(y(x),x$4)-diff(y(x),x$3)-9*diff(y(x),x$2)-11*diff(y(x),x)-4*y(x)=0,y(x), singsol=all)
 

\[ y \left (x \right ) = \left (c_4 \,x^{2}+c_3 x +c_{2} \right ) {\mathrm e}^{-x}+c_{1} {\mathrm e}^{4 x} \]

✓ Solution by Mathematica

Time used: 0.003 (sec). Leaf size: 32

DSolve[D[y[x],{x,4}]-D[y[x],{x,3}]-9*D[y[x],{x,2}]-11*D[y[x],x]-4*y[x]==0,y[x],x,IncludeSingularSolutions -> True]
 

\[ y(x)\to e^{-x} \left (c_3 x^2+c_2 x+c_4 e^{5 x}+c_1\right ) \]