Question

How do you simplify `(3/7)^-2`?

Answer 1

`(3/7)^-2 = ((3/7)^2)^-1 = ((3^2)/(7^2))^-1 = (9/49)^-1 = 49/9`

In general `(x^a)^b = x^(ab)` and `(p/q)^-1 = q/p`.