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True/False and Multiple Choice Questions

12. On the interval (0, 2π), f (x) = | sin x cos(2x)| has A. B. C. D.

a relative maximum only a relative minimum both a relative maximum and a relative minimum no relative extrema.

13. Answer true or false. f (x) =

x has a relative maximum on (0, ∞).

14. Answer true or false. A graphing utility can be used to show f (x) = |x2 | has a relative maximum. 15. Answer true or false. A graphing utility can be used to show f (x) = |x2 | − 2 has two relative maxima on [−10, 10].

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