# Math Help - derivatives

1. ## derivatives

Find the derivative of the function below.
f(x) = 16e^x + 3^x ...

need some help on doing this problem...kinda in a hurry, thanks

2. Originally Posted by mer1988
Find the derivative of the function below.
f(x) = 16e^x + 3^x ...

need some help on doing this problem...kinda in a hurry, thanks
$\frac d{dx}a^x = a^x \ln a$, for $a>0$ a constant

this rule works for $e^x$ as well, but generally, you just memorize that $\frac d{dx}e^x = e^x$

3. Originally Posted by Jhevon
$\frac d{dx}a^x = a^x \ln a$, for $a>0$ a constant

this rule works for $e^x$ as well, but generally, you just memorize that $\frac d{dx}e^x = e^x$

so then would the answer be,

f(x)= 16e^x+(ln3)3^x...?

4. Originally Posted by mer1988
so then would the answer be,

f(x)= 16e^x+(ln3)3^x...?
yes