Question: Determine the product E3 E2 E1 of the elementary matrices in (1.19). Is this the same as the product E1 E2 E3? Which is easier

Determine the product E3 E2 E1 of the elementary matrices in (1.19). Is this the same as the product E1 E2 E3? Which is easier to predict?
Determine the product E3 E2 E1 of the elementary matrices

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