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Mathematics
Mathematics
Problem
If
f
(
x
)
=
log
x
{
ln
(
x
)
}
f(x) = \log_x \{\ln(x)\}
f
(
x
)
=
lo
g
x
{
ln
(
x
)}
, then
f
′
(
x
)
f'(x)
f
′
(
x
)
at
x
=
e
x = e
x
=
e
, is a.
e
e
e
b.
−
e
-e
−
e
c.
e
2
e^2
e
2
d.
e
−
1
e^{-1}
e
−
1
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