1. \(\frac{a^9}{a^{12}}\) при \(a=4\)

\(\frac{a^9}{a^{12}} = a^{9-12} = a^{-3} = \frac{1}{a^3}\). Подставим \(a=4\): \(\frac{1}{4^3} = \frac{1}{64}\).