Ответы и объяснения

2013-06-07T21:31:51+04:00

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

2013-06-07T21:45:46+04:00

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