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Problem
Problem
The interval in which
f
(
x
)
=
cot
−
1
x
+
x
f(x) = \cot^{-1} x + x
f
(
x
)
=
cot
−
1
x
+
x
increases, is a.
R
R
R
b.
(
0
,
∞
)
(0, \infty)
(
0
,
∞
)
c.
R
−
{
n
π
}
R - \{n\pi\}
R
−
{
nπ
}
d. None of these
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