Answer: [tex]\frac{1}{3^6}=3^{-6}[/tex]
Explanation: Denominators of a fraction can be equivalently written as their value to the power of negative 1. In this case the denominator expression itself has an exponent of 6, which taken to the power of negative one becomes -6:
[tex]\frac{1}{3^6}=(3^6)^{-1}=3^{6(-1)}=3^{-6}[/tex]
