Verified answer

log(a) bc = log(a) b + log(a) c

log(3) a = -5

log(3) 27a = log(3) 27 + log(3) a = log(3) 3³ + log(3) a = 3 - 5 = -2

Ответ:

-2

Пошаговое объяснение:

log3(27a)=log3(3^3*3^-5)=log3(3^-2)=-2

log3a=-5 => 3^-5=a