Помогите решить: log8(12)- log8 (15) + log8 (20)

Question

Помогите решить: log8(12)- log8 (15) + log8 (20)

Answer 1

log8(12)- log8 (15) + log8 (20)= log8(12/15)+log8(20)=log8(4/5*20)=log8(16)=log2^3(2^4)=4/3

Answer 2

log8(12)- log8 (15) + log8 (20) = log8((12/15)*20) = (1/3)log2 (16) = 4/3