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A matrix is a rectangular array of numbers arranged in rows and columns.
Order: $$m \times n$$ (m rows, n columns). Example: $$A = \begin{bmatrix} a_{11} & a_{12} \\ a_{21} & a_{22} \end{bmatrix}$$
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A matrix is a rectangular array of numbers arranged in rows and columns.
Order: $$m \times n$$ (m rows, n columns). Example: $$A = \begin{bmatrix} a_{11} & a_{12} \\ a_{21} & a_{22} \end{bmatrix}$$
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