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In triangleABC a point P is taken on AB ...

In `triangleABC` a point P is taken on AB such that AP/BP=1/3 and a point Q is taken on BC such that CQ/BQ=3/1 . If R is the point of intersection of the lines AQ and CP, using vector method, find the area of `triangle ABC` if the area of `triangleAOC`.

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