Mathematics, 08.07.2019 06:10 ayandjay01

The graph of f ′′(x) is continuous and decreasing with an x-intercept at x = –3. which of the following statements must be true?
a. the graph of f is always concave down.
b. the graph of f has an inflection point at x = –3.
c. the graph of f has a relative minimum at x = –3.
d. none of these is true.

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