Question

calcule log 1/3 81=x

Answer 1

(1/3)^x = 81
(1/3)^x = 3^4
3^-1x = 3^4

Bases iguais, consideramos apenas os expoentes.

-1x = 4
x = -4.

Answer 2

$( \frac{1}{3})^x=81\ \textless \ \ \textgreater$

(3^-1)^x = 3^4

-x = 4

x = -4