1) 7•81^(1/4) - 11 = 7•(3⁴)^(1/4) - 11 = 7•3^(4•1/4) - 11 = 7•3¹ - 11 = 21 - 11 = 10.
2) 9^(1,4)/9^(0,4) = 9^(1,4-0,4) = 9¹ = 9.
1) 7•81^(1/4) - 11 = 7•(3⁴)^(1/4) - 11 = 7•3^(4•1/4) - 11 = 7•3¹ - 11 = 21 - 11 = 10.
2) 9^(1,4)/9^(0,4) = 9^(1,4-0,4) = 9¹ = 9.