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8-63.
  1. At which point(s) on f(x), graph below, do the following situations occur? Homework Help ✎

    1. f ′(x) and f ′′(x) are both positive

    2. f ′(x) and f ′′(x) are both negative

    3. f ′(x) is positive and f ′′(x) is negative

    4. f ′(x) is negative and f ′′(x) is positive

Translation: slope of f(x) is positive AND f(x) is concave up.

Refer to the hint in part (a).

Refer to the hint in part (a).

Points e and a.