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Mathematics
Mathematics
Problem
For a function
f
f
f
that is differentiable for all real numbers, which of the following must be true at a critical point
c
c
c
of
f
f
f
? a)
f
′
′
(
c
)
=
0
f''(c)=0
f
′′
(
c
)
=
0
b)
f
′
(
c
)
=
0
f'(c)=0
f
′
(
c
)
=
0
c)
f
′
(
c
)
f'(c)
f
′
(
c
)
does not exist d)
f
(
c
)
=
0
f(c)=0
f
(
c
)
=
0
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