%0 Journal Article
%T An Alternative Method for the Undetermined Coefficients and the Annihilator Methods
%A Oswaldo Rio Branco de Oliveira
%J Mathematics
%D 2011
%I arXiv
%X This paper exhibits a very simple formula for a particular solution of a linear ordinary differential equation with constant real coefficients, P(d/dt)x = f, f a function given by a linear combination of polynomials, trigonometrical and exponential real functions products. This is done by solving lower triangular linear systems with constant coefficients. Two examples are given.
%U http://arxiv.org/abs/1110.4425v3