Question

Evaluate the expression

9^4 x 9^-4

(Problem 8 in photo. Thank you!)

Answer 1

1

Explanation:

using the rules of exponents

`a^(m)` ×
`a^(n)` =
`a^((m+n))` ,
`a^(0)` = 1 , then

`9^(4)` ×
`9^(-4)`

=
`9^((4+(-4)))`

=
`9^((4-4))`

=
`9^(0)`

= 1