# Me this Inverse Laplace Transformation question

1. Apr 29, 2004

### mak_wilson

plz help me this Inverse Laplace Transformation question

Find the Inverse Laplace Transform of this function

1/(((s+1)^2)(1+e^(-2s)))

I just dont know how to separate it , plz help me

2. Apr 29, 2004

### Dr Transport

try partial fractions

3. Apr 29, 2004

### mak_wilson

Yes, But I read a few books about it, still dont get how to do that...

4. Apr 29, 2004

### Max0526

Maple 9 doesn't want to solve it

Hi;
Is it really
$$\frac{1}{(s+1)^{2}(1+e^{-2s})}$$
Maple 9 doesn't want to solve it.
Can you check it just in case.
Max.

Last edited: Apr 29, 2004
5. Apr 30, 2004

### mak_wilson

yes.... the question is right.

6. Dec 12, 2006

### peter.eaves

First put the (1+exp(-2s) factor into the numerator and expand as a series. the function appears to be a series of square wave pulses, which are probably modified by the (s+1)^2 factor.