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Mathematics
Mathematics
Problem
If
f
′
(
x
)
>
0
f'(x)>0
f
′
(
x
)
>
0
for every
x
x
x
in an interval
(
a
,
b
)
(a,b)
(
a
,
b
)
, then on that interval the function
f
f
f
is a) strictly decreasing b) constant c) strictly increasing d) non-decreasing (without being strictly increasing)
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