Sample bartleby Q&A Solution
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Question

Please help me with this question on matrices.

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Answer

We first find A2, for which we multiply A with itself. We perform matrix multiplication in which we multiply rows of first matrix with columns of second matrix element by element and add.

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Let us now find 3A, for which multiply each element of A by 3.

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Now, to find 2I we consider the identity matrix of order 3x3 and multiply its each element by 2. We take order 3x3 to match with the order of A2 and 3A.

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To find A23A+2I, consider all three matrices obtained in previous steps and add/subtract them.

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Answer: The value of A23A+2I is:

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