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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A = 1 -2 1 2 -1 0 1 -1 0
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1 2 1 1 0 0 2 0 1 0 1 0 11 0 0 0 1 Replace row 2 with 2R R Replace row 3 with R R...View the full answer
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