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Mathematics
Mathematics
Problem
If
f
(
x
)
=
log
x
(
log
x
)
f(x) = \log_x(\log x)
f
(
x
)
=
lo
g
x
(
lo
g
x
)
, then
f
′
(
x
)
f'(x)
f
′
(
x
)
at
x
=
e
x = e
x
=
e
is (a)
e
e
e
(b)
1
e
\frac{1}{e}
e
1
(c) 1 (d) None of these
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