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Math Help - vector

  1. #1
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    vector

    let A,B,C be vertices of triangle ABC in which B is taken as origin of reference and the position vectors of A and C are a and c A line AR parallel to BC is drawn from A.PR(P is midpoint of AB) meets AC at Q and area of triangle ACR is 2 times area of triangle ABC.
    find

    position vector of R
    position vector of Q
    (PQ/QR*AQ/QC) is equal to

    i am not understanding how to use given information of area in this question
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  2. #2
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    Re: vector

    I would imagine that one would have to use the fact that the vector product of two vectors is twice the area of the triangle formed by their endpoints.
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