# Inverse Laplace transform

1. Dec 19, 2011

1. The problem statement, all variables and given/known data

Compute the inverse Laplace transform of

2. Relevant equations

http://img267.imageshack.us/img267/696/66451772.png [Broken]

3. The attempt at a solution
I tried using partial fraction but no luck.

Last edited by a moderator: May 5, 2017
2. Dec 19, 2011

### I like Serena

Partial fraction decomposition should work.
How did you try it?

3. Dec 19, 2011

### vela

Staff Emeritus
Those transforms are already in the form you'd get from a partial fraction expansion so trying to expand them again should simply result in what you started with. Now it's just a matter of inverting each term using the table. Where are you getting stuck?

4. Dec 20, 2011

if i use Partial fraction decomposition, all fraction become zero!!!!

5. Dec 20, 2011

### I like Serena

vela is right.
Partial fraction decomposition does not work here.
You need a Laplace transform table.

But the fractions do not become zero.
How did you find zero?