11 11 points previous answers holtlinalg1 32040

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11. 1/1 points | Previous Answers HoltLinAlg1 3.2.040. Determine if the statement is true or false, and justify your answer. You may assume that A and B are matrices. If A and B are diagonal matrices, then so is n × n A B . True. If i = j , then A ij = B ij = 0, so ( A B ) ij = 0, and A B is diagonal.
12. 1/1 points | Previous Answers HoltLinAlg1 3.2.046. × n AB = BA , A = I n B = I Determine if the statement is true or false, and justify your answer. You may assume that A and B are matrices. If then either or n × n AB = BA , A = I n B = I n . B = . . B .
False. For example, A = , B = . 01 10 10 01

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