Internal problem ID [5177]
Book: Schaums Outline Differential Equations, 4th edition. Bronson and Costa. McGraw Hill
2014
Section: Chapter 11. THE METHOD OF UNDETERMINED COEFFICIENTS. Supplementary
Problems. page 101
Problem number: Problem 11.46.
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _linear, _nonhomogeneous]]
\[ \boxed {y^{\prime \prime }-2 y^{\prime }+y=4 \cos \left (x \right )} \]
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 17
dsolve(diff(y(x),x$2)-2*diff(y(x),x)+y(x)=4*cos(x),y(x), singsol=all)
\[ y \left (x \right ) = \left (c_{1} x +c_{2} \right ) {\mathrm e}^{x}-2 \sin \left (x \right ) \]
✓ Solution by Mathematica
Time used: 0.018 (sec). Leaf size: 21
DSolve[y''[x]-2*y'[x]+y[x]==4*Cos[x],y[x],x,IncludeSingularSolutions -> True]
\[ y(x)\to -2 \sin (x)+e^x (c_2 x+c_1) \]