Question

Решите уравнение: 3^x-1=27

Answer 1

3x=27+1
3x=28
x=28:4
x=7

Answer 2

$3^{x-1}=27;\ log_33^{x-1}=log_327;\ x-1=log_33^3;\ x-1=3;\ x=4;$