## Thinking Mathematically (6th Edition)

For any nonzero real number $a$, $a^{-m} = \dfrac{1}{a^m}$, where $m \gt 0$ . Example: $3^{-2} = \dfrac{1}{3^2}$
For any nonzero real number $a$, $a^{-m} = \dfrac{1}{a^m}$, where $m \gt 0$ . Example: $3^{-2} = \dfrac{1}{3^2}$