Ответ:

  1. \(64^{1/2}=\sqrt{64}=8\).
  2. \(27^{1/3}=\sqrt[3]{27}=3\).
  3. \(8^{2/3}=(\sqrt[3]{8})^2=2^2=4\).
  4. \(81^{3/4}=(\sqrt[4]{81})^3=3^3=27\).
  5. \(16^{-0.75}=16^{-3/4}=\dfrac{1}{(\sqrt[4]{16})^3}=\dfrac{1}{8}\).
  6. \(9^{-1.5}=9^{-3/2}=\dfrac{1}{(\sqrt{9})^3}=\dfrac{1}{27}\).