Question

Решите................

Answer 1

1)$log_764-log_7256+log_728=log_7( frac{64}{256}*28)=log_7( frac{64}{64}*7)=log_71*7=$$log_77=1;$
2)$log_38-log_34+log_3 frac{9}{2}=log_3( frac{8}{4}* frac{9}{2})=log_3( frac{1}{1}* frac{9}{1})=log_39=2.$