# How do you simplify #9^-5#?

The negative index is the main issue.

There isn't much benefit to using this form though; the index form is much more useful for using this fraction in calculations.

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To simplify (9^{-5}), you can use the property (a^{-n} = \frac{1}{a^n}).

(9^{-5} = \frac{1}{9^5} = \frac{1}{59049}).

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