Question

Luyện tập – Vận dụng 2

Tính

a)    \({\log _4}\sqrt[5]{{16}}\)

b)    \({36^{{{\log }_6}8}}\)

Answer 1

a) \(\log_4\sqrt[5]{16}=\log_4\left(4^2\right)^{\dfrac{1}{5}}=\log_44^{\dfrac{2}{5}}=\dfrac{2}{5}\log_44=\dfrac{2}{5}.1=\dfrac{2}{5}\)

b) \(36^{\log_68}=\left(6^2\right)^{\log_68}=6^{2\log_68}=6^{\log_68^2}=8^2=64\)

Answer 2

a: \(log_4\sqrt[5]{16}=log_4\sqrt[5]{4^2}=\dfrac{2}{5}\)

b: \(36^{log_68}=6\cdot^{2\cdot log_68}=8^2=64\)