In triangle OABOABOAB, OA⃗=a\vec{OA} = \mathbf{a}OA=a and OB⃗=b\vec{OB} = \mathbf{b}OB=b.
The point P P\,P divides AB AB\,AB in the ratio 2:32 : 32:3, and Q Q\,Q is the midpoint of OBOBOB.
Find OP⃗\vec{OP}OP in terms of a\mathbf{a}a and b\mathbf{b}b.
Find QP⃗\vec{QP}QP in terms of a\mathbf{a}a and b\mathbf{b}b, simplifying your answer.
The point R R\,R lies on the line OA OA\,OA produced, with OR⃗=λa\vec{OR} = \lambda\mathbf{a}OR=λa. Given that QQQ, P P\,P and R R\,R are collinear, find the value of λ\lambdaλ.
168 exam-style questions on AQA A Level Maths 1.13 J: Vectors, covering 1.13.1 Vectors in two and three dimensions, 1.13.2 Magnitude and direction of a vector, 1.13.3 Vector arithmetic, 1.13.4 Position vectors, and 1.13.5 Vectors to solve problems. Each one has a worked solution and a mark scheme showing where the marks go.