OAB is a triangle. O A = a OB = bC is the midpoint of OA.D is the point on AB


OAB is a triangle.
O A = a OB = bC is the midpoint of OA.D is the point on AB such that AD: DB = 3:1E is the point such that OB = 2BEUsing a vector method, prove that the points C, D and E lie on the same straightline.Input note: express CE in terms of CD(5 marks)​


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