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Mathematics
Mathematics
Problem
If
f
(
x
)
=
cot
−
1
(
x
x
−
x
−
x
2
)
f(x) = \cot^{-1} \left( \frac{x^x - x^{-x}}{2} \right)
f
(
x
)
=
cot
−
1
(
2
x
x
−
x
−
x
)
, then
f
′
(
1
)
f'(1)
f
′
(
1
)
equals a.
−
1
-1
−
1
b. 1 c.
log
e
2
\log_e 2
lo
g
e
2
d.
−
log
e
2
-\log_e 2
−
lo
g
e
2
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