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2 marksMatrix Operations

CSEC Mathematics · 2021 · Paper 2 · Question 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}.

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Other parts of this question

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

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