Вычислите: \(7^{-9}\cdot7^8\) . \(\frac{1}{7}\) \(\frac{1}{49}\) \(7\) \(49^{-72}\)
Задание

Вычислите: \(7^{-9}\cdot7^8\) .

  • \(\frac{1}{7}\)
  • \(\frac{1}{49}\)
  • \(7\)
  • \(49^{-72}\)