# Math Help - Derivative of e

1. ## Derivative of e

I'm trying to find the derivative of the following

$5(e^{-0.01x}-e^{-0.51x})$

Since I thought the derivative of $e^x$ is $e^x$, I thought that the derivative of the above expression was just itself:

$5(e^{-0.01x}-e^{-0.51x})$

If this is not right, how do I find out the derivative of some exponent with e?

2. Either use chain rule to find the derivative or use the formula that the derivative of $e^{ax+b}$ is $ae^{ax+b}$

The answer would be $-0.05e^{-0.01x}+2.55 e^{-0.51x}$