PART 6：例題-對數律

\({{\log }_{2}}\frac{1}{\sqrt{2}}=?\)

SOL:

\({{\log }_{2}}\frac{1}{\sqrt{2}}={{\log }_{2}}{{2}^{-\frac{1}{2}}}=-\frac{1}{2}{{\log }_{2}}2=-\frac{1}{2}\)