The dimensions of two matrices are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A is 1 × 3; B is 1 × 3.
A. AB is 1 × 3; BA is 3 × 1.
B. AB is not defined, BA is not defined.
C. AB is 1 × 1; BA is 3 × 3.
D. AB is 3 × 1; BA is 1 × 3.
Answer: B
Mathematics
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