# Please i need help and fast!

1. May 7, 2008

### momen salah

hi i'm new here and i wanted to ask a question

what is the laplace inverse of 1 ?

i have been told that it's laplace transform of dirac(t).

but what is dirac(t) please i have looked every where in the web for it it's two marks bonus for me if i get it and it's due today.

2. May 8, 2008

### Defennder

Last edited: May 8, 2008
3. May 8, 2008

### HallsofIvy

Staff Emeritus
The "Dirac delta function" is more commonly called just "the delta function". It is not, in fact, a "function" but rather a "generalized function" or "distribution". Roughly speaking that's a that's a functional: an operator that assigns a number to every function. The delta function assigns the number f(0) to every function f (so $\delta(t- a)$ that Defennnder show assigns the number f(a) to every function f).

4. May 9, 2008

thanks guys