Ответ:

  1. \(\dfrac{\sqrt[5]{a^6b^7}}{\sqrt[3]{ab^2}}\).
  2. \(\sqrt[3]{27x^3y^2}=3x\sqrt[3]{y^2}\).
  3. \(\sqrt[3]{\frac{27x^3}{y^3}}=\frac{3x}{y}\).
  4. \(\sqrt[4]{\frac{16b^4}{a^4}}=\frac{2b}{a}\).

Ответ: 1) \(\dfrac{\sqrt[5]{a^6b^7}}{\sqrt[3]{ab^2}}\); 2) \(3x\sqrt[3]{y^2}\); 3) \(\frac{3x}{y}\); 4) \(\frac{2b}{a}\).