Question

A is a matrix of order 2×mand B is a matrix of order 3×n such that both AB and BA are defined. Is AB−BA defined ?​

Answer 1

Answer:

Since AB exists, so the number of column in A= Number of column in B.

So B has n row.

Since BA exists, so the number of column in B= Number of column in A.

So B has m column.

∴ B is an n×m matrix.

Step-by-step explanation:

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