Problem

What are the dimensions of the matrix \( A = \begin{pmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \\ 10 & 11 & 12 \end{pmatrix} \)?

Answer

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Answer

The number of columns of matrix A is 3.

Steps

Step 1 ：The number of rows of matrix A is 4.

Step 2 ：The number of columns of matrix A is 3.

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