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Math Help - open interval and tangent lines

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    open interval and tangent lines

    Suppose that I is an open interval and that f "(x) is greater than or equal to 0 for all x in I. If b is in I, then show that the part of the graph of f on I is never below the tangent line to the graph at (b, f(b)).
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    MHF Contributor Drexel28's Avatar
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    Quote Originally Posted by sw2010 View Post
    Suppose that I is an open interval and that f "(x) is greater than or equal to 0 for all x in I. If b is in I, then show that the part of the graph of f on I is never below the tangent line to the graph at (b, f(b)).
    Here.

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