\(\log_4 7 = \frac{\log_6 7}{\log_6 4}\)
\(\log_3 6 = \frac{\log_6 6}{\log_6 3} = \frac{1}{\log_6 3}\)
\(\ln 8 = \frac{\log_6 8}{\log_6 e}\)
\(\lg 8 = \frac{\log_6 8}{\log_6 10}\)
Ответ: 1) \(\frac{\log_6 7}{\log_6 4}\), 2) \(\frac{1}{\log_6 3}\), 3) \(\frac{\log_6 8}{\log_6 e}\), 4) \(\frac{\log_6 8}{\log_6 10}\)