Question

log _2 (x-1)=3 решите уравнения пожалуйста

Answer 1

log2 (x-1) = log2 8
x-1 = 8
x=9

Answer 2

$log _2 (x-1)=3$

$2^3 = (x-1)$

$8 +1 = x$

$x = 9$