Question

Which expression is equivalent to 7^3x7^-5

A. 7^2
B. 7^7
C. 1/7^2
D. 1/7^7

Answer 1

C: 1 / 7^2

Explanation:

Here there are two exponentials with the same base (7).

To find the product, write the base (7) again, and form the exponent by combining the two exponents:

7^(3 - 5) = 7^(-2), or 1/49. None of the given possible answers match this. Answer C is closest: 1 / 7^2.