Question

How to find the derivative of f(x)=e^-x?

Answer 1

\[f(x)=e^{g(x)} \] \[f \prime=g \prime(x).f(x)\]

Answer 2

use chain rule:
\[e^{-x}\frac{ d }{ dx}(-x)=-e^{-x}\]

Answer 3

How would you use the chain rule to find that?

Answer 4

for example,\[\frac{ d }{ dx }(e^{-2x})=-2*e^{-2x}\]

Answer 5

(d/dx)(-2x)=-2, and e^(-2x) write it the same

Answer 6

This was really helpful, thank you!

Answer 7

@justine97 welcome ^_^.