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The figure below is a right pyramid with a rectangular base ABCD and VO as the height. The vectors AD=a, AB=b and DV=c
(a) Express
(i) AV in terms of A and c (ii) BV in terms of a, b and c (b) M is a point on OV such that OM: MV=3:4. Express BM in terms of a, b and c. Simplify your answer as far as possible.