. In 22, applying E21 and then E32 to the column b = (1,0,0) gives E32E21b = . Applying
Chapter 1, Problem 1.4.23(choose chapter or problem)
. In 22, applying E21 and then E32 to the column b = (1,0,0) gives E32E21b = . Applying E32 before E21 gives E21E32b = . When E32 comes first, row feels no effect from row .
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