Ответ:

  1. ³√(5³·7³) = 5·7 = 35.
  2. ⁴√(11⁴·3⁴) = 11·3 = 33.
  3. ⁵√((0,2)⁵·8⁵) = 0,2·8 = 1,6.
  4. ⁷√((1/3)⁷·21⁷) = (1/3)·21 = 7.