log39−log28log39\frac{\log_3 9 - \log_2 8}{\log_3 9}log39log39−log28
= log332−log223log332\frac{\log_3 3^2 - \log_2 2^3}{\log_3 3^2}log332log332−log223
= 2−32\frac{2-3}{2}22−3
= −12\frac{-1}{2}2−1
