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Mathematics
Mathematics
Problem
Which statement must be true if a function
f
f
f
is differentiable at
x
=
3
x=3
x
=
3
? a)
f
′
(
3
)
=
0
f'(3)=0
f
′
(
3
)
=
0
. b)
f
′
f'
f
′
is continuous at
x
=
3
x=3
x
=
3
. c)
f
f
f
is continuous at
x
=
3
x=3
x
=
3
. d)
f
f
f
is continuous on an open interval containing
x
=
3
x=3
x
=
3
.
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