Question

Under what condition an nth order non-homogeneous linear differential equation Initial value problem have a unique solution?And if the leading coefficients are 0 then what is the possibilities about its solution?

Answer 1

go to the website and read it should tell you. reading sucks but sometime you have to do it :p good luck.
http://tutorial.math.lamar.edu/Classes/DE/UndeterminedCoefficients.aspx