Question

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

A. r^42

B. 1/r^42

C. -7r^6

D. 1/r

Answer 1

(r^-7)^6 = r^-1 = 1/r

Therefore the answer is D. 1/r

Let me know if you have any questions.

Answer 2

B. 1/r^42

Explanation:

(r^-7)^6= r^-7*6= r^-42.

As a positive exponent: 1/r^42