Question

Dada a função
$f(x) = log_{3}(x - 2) = 2$
,o valor de x para que f(x)=2 é:

A)13
B)11
C)10
D)7
E)4
​

Answer 1

$f(x) = log_{3}(x-2)\\f(x) = 2\\log_{3}(x-2) = 2\\3^2 = (x-2)\\9 = x - 2\\-x = -9 - 2\\x = 11$