2025 IGCSE Additional Mathematics October/November 0606/13 Q7

2025 IGCSE Additional Mathematics October/November 0606/13 Q7

7 marks

The point \(O\) is the origin.

Two points \(P\) and \(Q\) are such that \(\overrightarrow{PQ}\) is in the same direction as \(-\mathbf i+5\mathbf j\).

  1. The point \(R\) is such that \(\overrightarrow{OR}\) is in the same direction as \(\overrightarrow{PQ}\) and the magnitude of \(\overrightarrow{OR}\) is \(3\sqrt{26}\).
    Find \(\overrightarrow{OR}\).[3]
  2. \(\overrightarrow{OP}\) is in the same direction as \(2\mathbf i-3\mathbf j\) and \(\overrightarrow{OQ}=10\mathbf i+6\mathbf j\).
    Find \(\overrightarrow{OP}\).[4]

Solution:

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Answer:(a) \(-3\mathbf i+15\mathbf j\) (b) \(16\mathbf i-24\mathbf j\)

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