Let $f$ be a real valued function, defined on $R - \{ - 1,1 \}$ and given by $f ( x ) = 3 \log _ { \mathrm { e } } \left| \frac { x - 1 } { x + 1 } \right| - \frac { 2 } { x - 1 }$. Then in which of the following intervals, function $f ( x )$ is increasing?\\
(1) $( - \infty , - 1 ) \cup \left( \left[ \frac { 1 } { 2 } , \infty \right) - \{ 1 \} \right)$\\
(2) $( - \infty , \infty ) - \{ - 1,1 \}$\\
(3) $\left( - 1 , \frac { 1 } { 2 } \right]$\\
(4) $\left( - \infty , \frac { 1 } { 2 } \right] - \{ - 1 \}$