# Math Help - Derivitive of this function...

1. ## Derivitive of this function...

How would you go from this:
$\\f(x) = \frac{1}{x^{2}}$

to this:
$\\f'(x) = -\frac{2}{x^{3}}$

Thanks to anyone who responds... somehow I can't get anything other than this:
$\\f'(x) = \frac{1}{2x^{1}}$

2. ## Re: Derivitive of this function...

$f(x)=x^{-2}$ so, $f'(x)=-2x^{-3}=\frac{-2}{x^3}$ .

3. ## Re: Derivitive of this function...

Okay, thank you. I guess that just means that I'm supposed to switch the variable to the numerator before I mess with it. I'll get it... eventually.