$$\left. \begin{array} { l } { \quad \frac { 1 } { 2 } ( 6 ^ { 2 x - 1 } ) = 108 } \end{array} \right.$$
$x=2$
$x=\frac{\pi n_{1}i}{\ln(6)}+2$
$n_{1}\in \mathrm{Z}$
