Mathematics
OpenStudy (anonymous):

explain how to do the following: Simplify the expression.

OpenStudy (anonymous):

Parth (parthkohli):

$$\Large \color{Black}{\Rightarrow {a^x \over a^y} = a^{x - y} }$$ Got it?

OpenStudy (anonymous):

oooh, thank you ! i had to refresh my memory ^.^

OpenStudy (anonymous):

$\frac{1}{a^y}=a^{-y}$

OpenStudy (anonymous):

so you will end up with a negative exponent that will have to go back into fraction form.

Parth (parthkohli):

No need to express as a fraction.

OpenStudy (anonymous):

Oh no I'm just showing why the a turns into negative and how to get rid of the negative if it does come up which does in this case.

Parth (parthkohli):

Hehe nice work