Вычислите: c) \(3^{-3}\); d) \(5^{-1}\).

1. \(3^{-3}=\frac{1}{3^3}=\frac{1}{27}\).
2. \(5^{-1}=\frac{1}{5}\).

Ответ: c) \(\frac{1}{27}\); d) \(\frac{1}{5}\).