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Recursive Sequence Value 2

The sequence $ (x_n) $ satisfies $ x_0 = 3 $ and \[x_n = \frac{1 + x_{n - 1}}{1 - x_{n - 1}}\]for all $ \ge 1 $. Find $ x_{12345} $.

1
2
3
+
4
5
6
-
7
8
9
$\frac{a}{b}$
.
0
=
%

$a^n$
$a^{\circ}$
$a_n$
$\sqrt{}$
$\sqrt[n]{}$
$\pi$
$\ln{}$
$\log$
$\theta$
$\sin{}$
$\cos{}$
$\tan{}$

$($
$)$
$[$
$]$
$\cap$
$\cup$
$,$
$\infty$