Ответ:

  1. \(\sqrt[6]{36^3}=36^{3/6}=36^{1/2}=6\).
  2. \(\sqrt[12]{64^2}=64^{2/12}=64^{1/6}=2\), так как \(64=2^6\).
  3. \(\sqrt[4]{(\frac{1}{25})^2}=(\frac{1}{25})^{2/4}=(\frac{1}{25})^{1/2}=\frac{1}{5}\).
  4. \(\sqrt[8]{225^4}=225^{4/8}=225^{1/2}=15\).

Ответ: 1) 6; 2) 2; 3) 1/5; 4) 15.