Question

помогите с логорифмом

Answer 1

$log_{\sqrt[4]{8}}8^4=log_{8^{\frac{1}{4}}}8^4=\frac{4}{\frac{1}{4}}=16$

Answer 2

$log_{a^x}b^y = \frac{y}{x} log_ab\\\\ log_{8^ \frac{1}{4} }8^4= \frac{4}{ \frac{1}{4} } log_88=4*4=16$