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Question
In applying one or more row operations while finding A–1 by elementary row operations, we obtain all zeros in one or more, then A–1 ______.
Solution
In applying one or more row operations while finding A–1 by elementary row operations, we obtain all zeros in one or more, then A–1 does not exist.
Explanation:
A–1 does not exist if we apply one or more row operations while finding A–1 by elementary row operations, obtain all zeroes in one or more rows.
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