In Exercises 1928, find A -1 by forming [A| I ] and then using row operations to
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In Exercises 19–28, find A-1 by forming [A| I] and then using row operations to obtain [I| B], where A-1 = [B]. Check that AA-1 = I and A-1 A = I.
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24-4 A 1 3 2 4 -4 -3
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4 1 0 0 4 0 1 0 43 0 0 1 Interchange row 1 and row 2 1 3 4 0 1 0 2 4 4 100 2 43 0 0 1 Re...View the full answer
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