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Problem
Problem
Solve for
x
x
x
:
tan
−
1
(
x
+
1
)
+
tan
−
1
x
+
tan
−
1
(
x
−
1
)
=
tan
−
1
3
\tan^{-1}(x+1) + \tan^{-1} x + \tan^{-1}(x-1) = \tan^{-1} 3
tan
−
1
(
x
+
1
)
+
tan
−
1
x
+
tan
−
1
(
x
−
1
)
=
tan
−
1
3
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