ABSTRACT
The standard form of the n-th order linear ODE is, again,
y(n) + p1(t)y(n−1) + · · · + pn−1(t)y˙+ pn(t)y = f (t). (4.1)
Definition 4.1
(a) A particular solution of an n-th order linear nonhomogeneous ODE (4.1) is any function yp(t) that satisfies (4.1).