Question

Which expression is equivalent to 9^-4?

A. -9^4

B. 9^4

C. 1/9^-4

D. 1/9^4

Answer 1

D

Explanation:

as a negative exponent always means 1/..., D is the correct answer.

9^-4 = 1/(9^4)

that is the precise definition of a negative exponent.