derivatives

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October 19th 2011, 05:16 AM
consevans

derivatives

Can anyone help me find the derivative of 3xe^-kx
-thank you
October 19th 2011, 05:28 AM
BAdhi

Re: derivatives

use chain rule, $u=3x$ and $v=e^{-kx}$
October 19th 2011, 06:14 AM
consevans

Re: derivatives

don't you have to use a combination of the product rule and chain rule?
October 19th 2011, 06:25 AM
Plato

Re: derivatives

Quote:

Originally Posted by consevans

Can anyone help me find the derivative of 3xe^-kx

If $y=f(x)e^{g(x)}$ then $y'=f'(x)e^{g(x)}+f(x)g'(x)e^{g(x)}$
October 19th 2011, 08:41 AM
HallsofIvy

Re: derivatives

Quote:

Originally Posted by BAdhi

use chain rule, $u=3x$ and $v=e^{-kx}$

I think you mean "product rule".

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