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Mathematics
Problem
Suppose the first derivative
q
′
(
x
)
q'(x)
q
′
(
x
)
of a twice-differentiable function
q
q
q
attains a local minimum at
x
=
7
x=7
x
=
7
. What is the value of
q
′
′
(
7
)
q''(7)
q
′′
(
7
)
? Briefly justify your answer in one sentence.
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