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Math Help - Vectors Problem

  1. #1
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    Vectors Problem

    http://i87.photobucket.com/albums/k1...ectorsprob.gif

    I'm not quite sure what I'm being asked to prove here. I presumably have to show that P satisfies some equation that shows it is a plane and not some other kind of surface but I don't know what that equation is.
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  2. #2
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    Dec 2008
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    Dear Ataxia,

    If you use a vector formalism, the equation of the plane is same in 3 or 4 or other dimension.

    Let n is a normal, so it is perpendicular to the plane, therefore their inner product (or scalar product) is null. So the equation is:
    \vec n \cdot \vec r = 0
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