Пошаговое объяснение:
1) Log₃ (x-1) = 0
ОДЗ: х-1>0, x>1
x-1 = 3⁰
x-1 = 1
x = 2
2) Log₂ (x-4) = 0
ОДЗ: х-4> 0, x>4
x-4 = 2⁰
x-4=1
x=5
3) Lg (Lgx) = 0
Lg x = 10⁰
Lg x = 1
x = 10¹
x= 10
Проверка:
Lg ( Lg 10) = Lg 1 = 0
0 = 0
