Question

Which value is equivalent to 9^c x 9^-c A. 0 B. 1 C. 1/9^2C D. 9

Answer 1

B

Explanation:

Using the rule of exponents

`a^(m)` ×
`a^(n)` =
`a^((m+n))`

`a^(0)` = 1

Given

`9^(c)` ×
`9^(-c)`

=
`9^((c-c))`

=
`9^(0)`

= 1 → B