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Mathematics
Mathematics
Problem
Let
f
(
x
)
=
x
+
cos
x
+
2
f(x) = x + \cos x + 2
f
(
x
)
=
x
+
cos
x
+
2
and
g
(
x
)
g(x)
g
(
x
)
be the inverse function of
f
(
x
)
f(x)
f
(
x
)
, then
g
′
(
3
)
g'(3)
g
′
(
3
)
equals to .....
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