nth term differential!

**lawochekel** · April 13th 2012, 01:55 AM

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?

**biffboy** · April 13th 2012, 02:10 AM

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

**HallsofIvy** · April 13th 2012, 07:59 AM

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

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