Question

What's the answer to log1/3 27 = ?

Answer 1

$log_\frac{1}{3}27=log_\frac{1}{3}3^3=3\cdot log_\frac{1}{3}3=3log_\frac{1}{3}\left(\frac{1}{3}\right)^{-1}=-1\cdot3log_\frac{1}{3}\frac{1}{3}=-3$