Internal problem ID [2273]
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 8.7, The Variation of Parameters
Method. page 556
Problem number: Problem 9.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _linear, _nonhomogeneous]]
Solve \begin {gather*} \boxed {y^{\prime \prime }-6 y^{\prime }+13 y-4 \,{\mathrm e}^{3 x} \left (\sec ^{2}\left (2 x \right )\right )=0} \end {gather*}
✓ Solution by Maple
Time used: 0.016 (sec). Leaf size: 51
dsolve(diff(y(x),x$2)-6*diff(y(x),x)+13*y(x)=4*exp(3*x)*sec(2*x)^2,y(x), singsol=all)
\[ y \relax (x ) = {\mathrm e}^{3 x} \sin \left (2 x \right ) c_{2}+{\mathrm e}^{3 x} \cos \left (2 x \right ) c_{1}+{\mathrm e}^{3 x} \left (\sin \left (2 x \right ) \ln \left (\frac {1+\sin \left (2 x \right )}{\cos \left (2 x \right )}\right )-1\right ) \]
✓ Solution by Mathematica
Time used: 0.063 (sec). Leaf size: 44
DSolve[y''[x]-6*y'[x]+13*y[x]==4*Exp[3*x]*Sec[2*x]^2,y[x],x,IncludeSingularSolutions -> True]
\begin{align*} y(x)\to e^{3 x} (c_2 \cos (2 x)+\sin (2 x) (-\log (\cos (x)-\sin (x))+\log (\sin (x)+\cos (x))+c_1)-1) \\ \end{align*}