The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product can be calculated.A is 1 × 3; B is 3 × 1.
A. AB is 1 × 1; BA cannot be calculated.
B. AB is 1 × 1; BA is 3 × 3.
C. AB is 3 × 3; BA is 1 × 1.
D. AB cannot be calculated; BA is 3 × 3.
Answer: B
Mathematics
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