Question

Which expression is equivalent to (r^-7)^6?

Answer 1

`(1)/(r^4^2)` (option B)

Explanation:

`\left(a^b\right)^c=a^(bc),`

So, we need to first multiple -7 × 6 (= -42)

our new value is
`r^(-42\\)`

`\:a^(-b)=(1)/(a^b)`

So, we simplify
`r^(-42\\)` to
`(1)/(r^4^2)`

Answer 2

Explanation: