MULTIPLE CHOICE
17) A, B and C are 2x2 matrices, and C is invertible, and ABC = BAC. Three of the following four equations must be true. Which one of the following equations is NOT necessarily true? a) AB = BA b) CAB = C-'BA c) ABCAT = BACAT d) AC = CA
17) A, B and C are 2x2 matrices, and C is invertible, and ABC = BAC. Three of the following four equations must be true.
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17) A, B and C are 2x2 matrices, and C is invertible, and ABC = BAC. Three of the following four equations must be true.
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