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Let A,B,C be the vertices of a triangle ABC in which B is taken an origin of reference and position vectors of A and C bara and barc respectively. A line AR parallel to BC is drawn from A PR(P is mid point of AB) meets AC at Q and area of triangle ACR is 2 times area of triangle ABC. Positions vector of R in terms of bara and barc is z 1. 2. bara+3barc 3. bara+barc 4.bara+4barc Position vector of Q is (considering result of Q(7)). 1.(2bara+3barc)/5 2.(3bara+2barc)/5 3. (bara+2barc)/3 4. None of these (PQ/QR). (AQ/QC) is equal to 1. 1//4 2. 2//5 3. 3//5 1//6 |
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