2 marksInverse of a 2x2 Matrix
CSEC Mathematics · 2021 · Paper 2 · Question 10(b)
Determine the inverse of \begin{pmatrix}5 & 4 \\ -3 & -2\end{pmatrix}.
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Practise this questionOther parts of this 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}.[2 marks] - 10(a)(ii)State why the two matrices in (a)(i) are conformable for multiplication.[1 mark]
- 10(c)(i)
\vec{CD}[2 marks] - 10(c)(ii)
\vec{OE}[2 marks] - 10(d)(i)Write
\vec{OR}as a column vector.[1 mark] - 10(d)(ii)Determine
|\vec{QR}|.[2 marks]
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