Question

12*log(ab,b)=?       esli   log(a,b)=5

Answer 1

$12log_{ab}{b}=12cdot frac{log_{a}{b}}{log_{a}{ab}}=12cdot frac{log_{a}{b}}{log_{a}{a}+log_{a}{b}}=12cdot frac{5}{1+5}=2cdot 5=10$