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Math Help - Simple Critical Point Problem

  1. #1
    Newbie
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    Nov 2009
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    Simple Critical Point Problem

    Hello all,

    Here is a pretty simple equation that I need to find the critical points for. I know how to find the critical points for an equation, but I'm not able to figure this one out.



    =>
    0 =

    I got -21 and 0 for my critical values. Are there any more?
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  2. #2
    Senior Member
    Joined
    Nov 2009
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    Be careful

    I think you're trying to find when the first derivative is zero. At x=0 and x=-21 the derivative blows up (denominator is zero). If I got the derivative right, I think x=-7 is what you're looking for.
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