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Math Help - Proof: X+y+z=1 Then XY +XZ+YZ =1/2

  1. #1
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    Proof: X+y+z=1 Then XY +XZ+YZ =1/2

    We never went over this in class, and am trying to get this as a bonus question

    x+y+z=1
    Then X*Y + X*Z + Y*Z < or = 1/2

    I can show examples but that will take forever. There has to be a general way to show this.
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  2. #2
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    Quote Originally Posted by probowl8885 View Post
    We never went over this in class, and am trying to get this as a bonus question

    x+y+z=1
    Then X*Y + X*Z + Y*Z < or = 1/2

    I can show examples but that will take forever. There has to be a general way to show this.
    Bonus questions sound like they count towards final grade. Please read forum rule #6.

    Thread closed.
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