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Mathematics
Mathematics
Problem
If
d
d
x
f
(
x
)
=
log
x
\frac{d}{dx}f(x) = \log x
d
x
d
f
(
x
)
=
lo
g
x
, then
f
(
x
)
f(x)
f
(
x
)
equals a)
x
(
log
x
−
x
)
+
c
x(\log x - x) + c
x
(
lo
g
x
−
x
)
+
c
b)
x
(
log
x
−
1
)
+
c
x(\log x - 1) + c
x
(
lo
g
x
−
1
)
+
c
c)
x
(
log
x
+
x
)
+
c
x(\log x + x) + c
x
(
lo
g
x
+
x
)
+
c
d)
1
x
+
c
\frac{1}{x} + c
x
1
+
c
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