[[$ a^{-n} = \frac{1}{a^{n}},\ $]]​kun ​[[$ a\neq 0 $]]​

esim.
​[[$ 2^{-3} = $]]​​

​​[[$ 7^{-2} = $]]​​

​[[$ (-3)^{-3} = $]]​​

​[[$ (-3)^{-2} = $]]​​



HUOM! [[$ (\frac{2}{3})^{-4}= $]]​