Question

Two points A and B have position vectors a and b respectively relative to origin O. The points P and OA on AB are such that OP=3PA and 5AQ=7QB. The point R is on PQ produced so that 5PQ=4QR. Express vectors AQ, PQ and PR in terms of a and b. Prove by a vector method that O, B, R are collinear.

Answer 1

Answer:

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