Question

dadas as funções 3x elevado -1=81 e (3/4)× =(16/9)

Answer 1

(3x)^ -1 = 81

(3x )^ - 1 = 3^4

- x.(1) = 4

- x = 4

x = - 4

B)

(3/4)^ × =(16/9)

(3/4) ^x = (4/3)^2

(3/4)^x = (3/4)^ - 2

x = - 2