Me this Inverse Laplace Transformation question

[mak_wilson]

please help me this Inverse Laplace Transformation question

Find the Inverse Laplace Transform of this function

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

I just don't know how to separate it , please help me

 

[Dr Transport]

try partial fractions

 

[mak_wilson]

Yes, But I read a few books about it, still don't get how to do that...

 

[Max0526]

Maple 9 doesn't want to solve it

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

 

[mak_wilson]

yes... the question is right.

 

[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.