Questions: The sizes of two matrices A and B are given. Find the sizes of the product AB and the product BA, whenever these products exist. A is 5 x 3, and B is 3 x 5. Find the size of the product AB. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The size of product AB is . B. The product AB does not exist.

The sizes of two matrices A and B are given. Find the sizes of the product AB and the product BA, whenever these products exist.
A is 5 x 3, and B is 3 x 5.

Find the size of the product AB. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.
A. The size of product AB is  .
B. The product AB does not exist.
Transcript text: The sizes of two matrices $A$ and $B$ are given. Find the sizes of the product $A B$ and the product $B A$, whenever these products exist. $A$ is $5 \times 3$, and $B$ is $3 \times 5$. Find the size of the product AB. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The size of product $A B$ is $\square$ $\square$ $\square$. B. The product $A B$ does not exist.
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Solution

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Solution Steps

Step 1: Determine the existence of AB

The product ABAB exists because the number of columns in AA (n=3n=3) is equal to the number of rows in BB (p=3p=3). Thus, the size of the product ABAB is m×q=5×5=(5,5)m \times q = 5 \times 5 = (5, 5).

Step 2: Determine the existence of BA

The product BABA exists because the number of columns in BB (q=5q=5) is equal to the number of rows in AA (m=5m=5). Thus, the size of the product BABA is p×n=3×3=(3,3)p \times n = 3 \times 3 = (3, 3).

Final Answer:

The size of the product ABAB is (5, 5). The size of the product BABA is (3, 3).

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