Question: Suppose f '' is continuous on (,). (a)If f ' (1) = 0 and f '' (1) =3, what can you say about f ?
Supposef ''is continuous on (,).
(a)Iff'(1) = 0 andf''(1) =3,
what can you say aboutf?
Atx= 1,fhas a local maximum.
Atx= 1,fhas a local minimum.
Atx= 1,fhas neither a maximum nor a minimum.
More information is needed to determine iffhas a maximum or minimum atx= 1.
(b)Iff'(3) = 0 andf''(3) = 0,
what can you say aboutf?
Atx= 3,fhas a local maximum.
Atx= 3,fhas a local minimum.
Atx= 3,fhas neither a maximum nor a minimum.
More information is needed to determine iffhas a maximum or minimum atx= 3.

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