Second order non-homogeneous linear diff equations:

Variation of Parameters:   Formula derivation

1. Find the general solution of the diff equations.

a. \(y''-3y'+2y=3e^t\) solution

b. \(y''-2y'=3e^{2t}\) solution

c. \( y''+4y=3\csc{t} \)  solution

d. \( y''+9y=2\sec^2{3t} \)  solution