Question

log0.6 10 - log0.6 6

Answer 1

$log_{0.6}10 - log_{0.6}6 = log_{0.6}frac{10}{6} = log_{0.6}(frac{6}{10})^{-1} =\\ log_{0.6}(0.6)^{-1} = -log_{0.6}0.6 = -1$