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Math Help - Vector proof

  1. #1
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    Vector proof

    A, B, and C are three points on a plane such that O->A = p, O->B = 3q - p and O->C = 9q - 5p.

    a) Show that A, B, and C are collinear.
    b) State the ratio AB : BC.

    Note p, q are vectors.
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  2. #2
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    Quote Originally Posted by scorpion007 View Post
    A, B, and C are three points on a plane such that O->A = p, O->B = 3q - p and O->C = 9q - 5p.

    a) Show that A, B, and C are collinear.
    b) State the ratio AB : BC.
    Note p, q are vectors.
    Hi,

    I've attached an image to show you what I've calculated.

    EB
    Attached Thumbnails Attached Thumbnails Vector proof-koll_vektor.gif  
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