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Select all of the elementary matrices below. 1 0 1 0 1 0 0 1 0 1 -1 -1 -1 -1 0 1 1

Select all of the elementary matrices below. 1 0 1 0 1 0 0 1 0 1 -1 -1 -1 -1 0 1 1 1 0 0 1 0

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