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6. Let A be a 5x3 matrix, B be 4x3 matrix and C be 3x4 matrix. Determine which of the following products are defined and

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6. Let A be a 5x3 matrix, B be 4x3 matrix and C be 3x4 matrix. Determine which of the following products are defined and find the size of those that are defined: AB, BA, AC, CA, BC, CB. a) b) What is the best order to form the product ABC if A, B and C are matrices with dimensions 30x10, 10x40, and 40x50 respectively

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