# Math Help - power rule derivatives

1. ## power rule derivatives

ok i need some help with this one...

h(x) = x^5+1/(9x)

i know first you have to make it so you have powers, but how would you do that for 1/(9x)...thanks

mathlete

2. $\frac{1}{x^n} = x^{-n}$

So,
$\frac{1}{9x} = \frac{1}{9}\cdot \frac{1}{x} = \frac{1}{9}\cdot x^{-1}$