Question

Help Please! Find the inverse laplace of F(s)=
(e^(-1s)-e^(-4s))/s^3

Answer 1

@TuringTest

I ended up getting (1/2)((t-1)^2)(t-1)-(t-4)^2)(t-4) and it's wrong :(

Answer 2

@phi

Answer 3

See
http://www.wolframalpha.com/input/?i=inverse+laplace++%28e%5E%28-1s%29-e%5E%28-4s%29%29%2Fs%5E3
your (t-1) and (t-4) terms should be step functions.

Answer 4

oh i see! thank you!