Question

what's the derivative of \[e^{-t}\]

Answer 1

do u know the derivative for e^t ???

Answer 2

yes its the same, e^t

Answer 3

\[u=-t\]chain rule:\[\frac d{dt}f(u)=f'(u)\frac{du}{dt}\]

Answer 4

Consider that\[{d \over d\text{number}}e^{\text{number}} = e^{\text{number}}\]

Answer 5

use the formula