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2 marksMagnitude of a Vector

CSEC Mathematics · 2021 · Paper 2 · Question 10(d)(ii)

The points O, Q and R have coordinates (0, 0), (5, 2) and (-1, 4) respectively.

Determine |\vec{QR}|.

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Other parts of this question

  1. 10(a)(i)Calculate the matrix product \begin{pmatrix}5 & 4 \\ -3 & -2\end{pmatrix}\begin{pmatrix}2 & 1 & -4 \\ 0 & 3 & 6\end{pmatrix}.[2 marks]
  2. 10(a)(ii)State why the two matrices in (a)(i) are conformable for multiplication.[1 mark]
  3. 10(b)Determine the inverse of \begin{pmatrix}5 & 4 \\ -3 & -2\end{pmatrix}.[2 marks]
  4. 10(c)(i)\vec{CD}[2 marks]
  5. 10(c)(ii)\vec{OE}[2 marks]
  6. 10(d)(i)Write \vec{OR} as a column vector.[1 mark]

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