Internal problem ID [11466]
Book: A First Course in Differential Equations by J. David Logan. Third Edition. Springer-Verlag,
NY. 2015.
Section: Chapter 2, Second order linear equations. Section 2.3.1 Nonhomogeneous Equations:
Undetermined Coefficients. Exercises page 110
Problem number: 2(c).
ODE order: 2.
ODE degree: 1.
CAS Maple gives this as type [[_2nd_order, _with_linear_symmetries]]
\[ \boxed {x^{\prime \prime }+x=t^{2}} \]
✓ Solution by Maple
Time used: 0.0 (sec). Leaf size: 17
dsolve(diff(x(t),t$2)+x(t)=t^2,x(t), singsol=all)
\[ x \left (t \right ) = \sin \left (t \right ) c_{2} +\cos \left (t \right ) c_{1} +t^{2}-2 \]
✓ Solution by Mathematica
Time used: 0.021 (sec). Leaf size: 20
DSolve[x''[t]+x[t]==t^2,x[t],t,IncludeSingularSolutions -> True]
\[ x(t)\to t^2+c_1 \cos (t)+c_2 \sin (t)-2 \]