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Year 12 Specialist (Unit 3 & 4) Vectors in two and three dimensions

Geometric proofs

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Question 1
196039
Relative to the origin \(O\), the points \(A\) and \(B\) (in three dimensions) have position vectors \(\mathbf{a}\) and \(\mathbf{b}\). The point \(M\) is the midpoint of \(AB\). Express \(\overrightarrow{OM}\) in terms of \(\mathbf{a}\) and \(\mathbf{b}\).
\(\dfrac{1}{2}(\mathbf{a}+\mathbf{b})\)

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