1. ## nth term differential!

find the nth differential co-efficient of $-e^{-3x}$

here below i presume is the answer after attempt;
$(-1)^n3^ne^{-3x}$

pls could i be right? thanks.

what then is the answer to this problem?

2. ## Re: nth term differential!

You can check that is not correct for n=1.

3. ## Re: nth term differential!

The first derivative of $-e^{-3x}$ is $3e^{-3x}$ which, as biffboy told you, does not fit your formula. Did you forget the leading "-"?