If matrix A is of order 2 by 3 and matrix B is of order 3 by 1, then the order of AB is _____?
Answer: 2 by 1
Explanation
When multiplying matrices, the order of the resulting matrix is determined by the rows of the first matrix (A) and columns of the second matrix (B).
Since A is 2×3 and B is 3×1, the resulting matrix AB will be of order 2×1.
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