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Which of the following statements must be true?
A. f is increasing on the interval (0,2)
B. f is decreasing on the interval (0,2)
C. f has a local maximum at x=1
D. The graph of f has a point of inflection at x=1
E. The graph of f changes concavity in the interval (0,2)
The correct answer is E, but I don't understand. The interval (0,2) is an open interval, meaning that 0 and 2 are not included, then it can really be stated that the concavity changes if the only information we have is from 0 and 2?

Which of the following statements must be true A f is increasing on the interval 02 B f is decreasing on the interval 02 C f has a local maximum at x1 D The gra class=

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