The product of two 2x3 matrices A2x3 and B2x3 is?

Question

a 4x9 matrix
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a 4x3 matrix
a 2x3 matrix
a number
a 2x9 matrix

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Answer 1 · 2017-10-13T10:54:36

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We can only multiply matrices together if the first matrix is #mxxn# and the second is #nxxo# resulting in a #mxxo# matrix.

so neither the product #AB# nor #BA# is defined.