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 0-1 0 1 00 00 00 0 3 0 0 0 1
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1 0 0 0 10 0 1 0 0 0 1 0 030 0 1 1 0 1 0 0 0 0 000 0 0 ...View the full answer
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