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Math Help - max function derivative

  1. #1
    Newbie
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    Jan 2010
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    1

    max function derivative

    How can I/Is it possible to derive a function which contains a max function built in?

    Example:

    y=10+2*max(10z+2 , 0)




    Thank you very much for your attention
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  2. #2
    Senior Member
    Joined
    Jan 2010
    Posts
    354
    Rewrite it as a piecewise function first, i.e.,

    <br />
y = \left\{ \begin{array}{ll}<br />
 20z+14, & \mbox{ if } z > -1/5 \\<br />
 10, & \mbox{ if } z \le -1/5<br />
 \end{array} \right.<br />
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