Question

How do you simplify `\frac { r ^ { 81} \cdot r ^ { - 6} \cdot r ^ { 6} } { r ^ { - 87} }` using positive exponents?

Answer 1

`r^168`

Explanation:

Move the `r` with exponents to the numerator:

`r^87xx r^81 xx r^-6 xx r^6`

Add all the exponents together:

`r^(87+81+(-6)+6)`

Simplify:

`r^168`