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Let As(4-1) md-G) (a) Compute A + B, if definded. If not defined, say so and give a reason. Answer: (b) Compute AB, if defined. If not defined, say so and give a reason. Answer: (c) Compute BA, if defined. If not defined, say so and give a reason. Answer: (d) Give a reason why AB BA? Answer: 2. Let A, B, be two matrices of same size, where X is unknown. Suppose 5X -7A-2B Solve for X. Answer:
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