Question

(1/9)elevado a ^3x = 1/81

Answer 1

81 = 3³
e
9= 3²

Portanto

(1/3)^(2.3x) = (1/3)^(3)

Como conseguimos igualar as bases, igualaremos os expoentes:
2.3x = 3
6x = 3
x = 3/6
x = 1/2

=)

Answer 2

( 1/9 )³ˣ = ( 1/81 )

[( 1/3 )²]³ˣ = ( 1/3 )⁴

6x = 4

x = 4/6

x = 2/3   Resposta.