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Math Help - unreachable point

  1. #1
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    unreachable point

    Problem: f(x,y) is given by this. find the extreme points.

    Attempt: https://dl.dropbox.com/u/586465/Phot...%2037%2004.jpg

    The this is: According to the book, (0.5 ; 1) is also a point. But I can't see how.
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  2. #2
    Senior Member MaxJasper's Avatar
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    Lightbulb Re: unreachable point

    Quote Originally Posted by jacob93 View Post
    Problem: f(x,y) is given by this. find the extreme points.
    Attempt: https://dl.dropbox.com/u/586465/Phot...%2037%2004.jpg
    The this is: According to the book, (0.5 ; 1) is also a point. But I can't see how.
    \frac{\partial f(x,y)}{\partial x} = 8 x-8 y+4 y^2

    \frac{\partial f(x,y)}{\partial y} = -8 x+8 x y
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  3. #3
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    Re: unreachable point

    thanks
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