Question

Loga(ab). Если Loga b=5

Answer 1

Loga(ab)=Loga(a)+Loga(b)= 1 + 5 = 6

Answer 2

Loga(ab )=Loga(a)+Loga(b)=1+5=6

Answer 3

$log_ab=5\\log_a(ab)=log_aa+log_ab=1+5=6$

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Использованы формулы

$log_c(nm)=log_cn+log_cm;~~n,m>0\log_cc=1$