Question

how to solve it... answer is C

Answer 1

Èllõ......!!

Answer:-

$log_{7} log_{7} \sqrt{7 \sqrt{7 \sqrt{7} } } \\ \\ = log_{7} log_{7} {7}^{ \frac{7}{8} } \\ \\ = log_{7} \frac{7}{8} \\ \\ = 1 - 3 log_{7}(2)$

THÅÑKẞ....!!