示例

$[\begin{array}{c} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{array}]$

解题步骤 1

A matrix is a rectangular arrangement or array of elements. The dimensions of a matrix, $m \times n$ , identify how many rows and columns a matrix has. $m$ represents the number of rows and $n$ represents the number of columns. Assuming that the matrix name is $A$ , the matrix dimensions are written as $A_{m \times n}$ .

解题步骤 2

The number of rows is $3$ .

$m = 3$

解题步骤 3

The number of columns is $3$ .

$n = 3$

解题步骤 4

The given matrix has dimensions $m \times n = 3 \times 3$ .

$A_{m \times n} = A_{3 \times 3}$

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