Question

Select the correct answer.

Simplify the expression 5^-3 x 5^-5

A 1/5^2

B -5^2

C 5^2

D 1/5

Answer 1

A 1/5^2

Explanation:

5^3 x 5^-5

We know that a^b* a^c = a^(b+c)

5^3 x 5^-5 = 5^(3-5) = 5^-2

We also know that a^-b = 1/ a^b

5^-2 = 1/5^2