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Math Help - Relative and Absolute Extrema

  1. #1
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    Relative and Absolute Extrema

    Find all relative and absolute extrema in the function f(x) = cos((2pi/3)(x)) on the interval [0,2].

    I know how to solve for the extremes, but I'm having a problem finding the first and second derivatives of the function. Any help?
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  2. #2
    MHF Contributor Calculus26's Avatar
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