Internal problem ID [2760]
Book: Differential equations and linear algebra, Stephen W. Goode and Scott A Annin. Fourth
edition, 2015
Section: Chapter 8, Linear differential equations of order n. Section 8.3, The Method of
Undetermined Coefficients. page 525
Problem number: Problem 41.
ODE order: 4.
ODE degree: 1.
CAS Maple gives this as type [[_high_order, _missing_y]]
\[ \boxed {y^{\prime \prime \prime \prime }+104 y^{\prime \prime \prime }+2740 y^{\prime \prime }=5 \,{\mathrm e}^{-2 x} \cos \left (3 x \right )} \]
✓ Solution by Maple
Time used: 0.016 (sec). Leaf size: 58
dsolve(diff(y(x),x$4)+104*diff(y(x),x$3)+2740*diff(y(x),x$2)=5*exp(-2*x)*cos(3*x),y(x), singsol=all)
\[ y \left (x \right ) = \frac {\left (\left (667 c_{1} +156 c_{2} \right ) \cos \left (6 x \right )-156 \left (c_{1} -\frac {667 c_{2}}{156}\right ) \sin \left (6 x \right )\right ) {\mathrm e}^{-52 x}}{1876900}+\frac {5 \left (-695 \cos \left (3 x \right )-2448 \sin \left (3 x \right )\right ) {\mathrm e}^{-2 x}}{84184477}+c_{3} x +c_{4} \]
✓ Solution by Mathematica
Time used: 4.755 (sec). Leaf size: 82
DSolve[y''''[x]+104*y'''[x]+2740*y''[x]==5*Exp[-2*x]*Cos[3*x],y[x],x,IncludeSingularSolutions -> True]
\[ y(x)\to -\frac {12240 e^{-2 x} \sin (3 x)}{84184477}-\frac {3475 e^{-2 x} \cos (3 x)}{84184477}+c_4 x+\frac {(156 c_1+667 c_2) e^{-52 x} \cos (6 x)}{1876900}+\frac {(667 c_1-156 c_2) e^{-52 x} \sin (6 x)}{1876900}+c_3 \]