Question

Help me solve this please?

Answer 1

Explanation:

Simplify the following expression then state the property used:

9^-2

Property:

Given,

9^-2

For any real numbers a and b a, b ≠ 0, and for any two positive integers, n and n

a^-m

=> 1/a^m [By doing reciprocal]

So,

9^-2

=> 1/9^2

=> 1/(3^2)^2

=> 1/(3^4)

=> 1/(3*3*3*3)

=> 1/81. Ans.

Hope this helps.