## HELP! Inverse Laplace Transform

I'm having some trouble getting the inverse Laplace to the following problems...I need some help

F(s)=24/s^5

F(s)= 4/[((s-2)^2)+25

F(s)= s/(s-1)(s+1)
 Recognitions: Homework Help For the first one, consider L{tn} works out to be for n>0. For the second one what is $$L^{-1} (\frac{1}{s^2+k^2)$$ for the third one, split into partial fractions.

 Quote by rock.freak667 For the first one, consider L{tn} works out to be for n>0. For the second one what is $$L^{-1} (\frac{1}{s^2+k^2)$$ for the third one, split into partial fractions.

would this be right for the third one

A/s-1 + B/s+1 = s

Recognitions:
Gold Member

## HELP! Inverse Laplace Transform

 Quote by Patton84 would this be right for the third one A/s-1 + B/s+1 = s
Yes that's correct.

 Quote by djeitnstine Yes that's correct.
No that is wrong, the right formula is:

$$\frac{s}{(s-1)(s+1)}=\frac{A}{s-1}+\frac{B}{s+1}$$

from which you need to determine A and B.

coomast

Recognitions:
Gold Member
 Quote by coomast No that is wrong, the right formula is: $$\frac{s}{(s-1)(s+1)}=\frac{A}{s-1}+\frac{B}{s+1}$$ from which you need to determine A and B. coomast

Oops I thought he multiplied it out and set it equal to s