Year 11 Maths - Specialist Matrices

Matrix notation

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Questions

Question 1

56658

Write down the size of the following matrices.

i) $\left[ {\begin{array}{{20}{c}}a&b\\c&d\end{array}} \right]$ ii) $\left[ {\begin{array}{{20}{c}}a&b&c\\d&e&f\end{array}} \right]$

Answer

i) $2 \times 2$ ii) $2 \times 3$

Worked Solution

$$
\begin{aligned}
\text{(i)}\quad &\text{2 rows 2 columns}\ \therefore 2 \times 2\\ \text{(iii)}\quad &\text{2 rows, 3 columns}\
\therefore 2 \times 3
\end{aligned}
$$

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