Question

Luyện tập – Vận dụng 5

Tính: \(2{\log _3}5 - {\log _3}50 + \frac{1}{2}{\log _3}36\)

Answer 1

\(=log_35^2-log_350+log_36\)

\(=log_3\left(\dfrac{25}{50}\cdot6\right)=log_33=1\)

Answer 2

\(2\log_35-\log_350+\dfrac{1}{2}\log_336=\log_35^2-\log_350+\log_336^{\dfrac{1}{2}}=\log_325-\log_350+\log_36=\log_3\left(\dfrac{25}{50}.6\right)=\log_33=1\)