$\displaystyle \log_{3}{ \frac{31}{18} }$\displaystyle \log_{3}{ \frac{31}{18} }

$\displaystyle \log_{3}{ \frac{5}{11} }$\displaystyle \log_{3}{ \frac{5}{11} }

$\left(-1\right)$\left(-1\right)

$\displaystyle \frac{1}{3}$\displaystyle \frac{1}{3}