Kevin S. answered • 01/24/13

If you have something raised to a negative power, you take the reciprocal of it. Therefore, 9^{-1} now becomes 1/9.

Replacing that in the original problem, we get (1/9)(√9) or (√9)/9

Since (√9) = 3, we get (√9)/9 = 3/9 and we can reduce to 1/3