C Q18 anion mun SO TO COO D 0% sail od bas sya syd bezolons non R In the diagram above OC = = c and OĎ=d. The points P and Q lie on OC and OD produced respectively, so that OC : CP= 1:2 and OD: DQ = 2:1. The line CD is extended to R so t CD= DR. (i) Find, in terms of c and/or d, the vectors OP, OO and OR. (ii) Show that the points P, Q and R are collinear and find the ratio PQ: QR.

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