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Mathematics
Problem
If a differentiable function
f
f
f
is decreasing on the open interval
(
2
,
5
)
(2,5)
(
2
,
5
)
, what is the sign of
f
′
(
x
)
f'(x)
f
′
(
x
)
for
2
<
x
<
5
2<x<5
2
<
x
<
5
?
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