Simplify each expressions. (3^42^2)^-1, 2^4/2^2

Question

Simplify each expressions.

Answer 1

1/(3^84)  and 2^2 or 4

Answer 2

The three identities that you need to recal are: (x^a)^b = x^(ab), x^a / x^b = x^(a-b), and x^(-a) = 1/x^a