If the entries of A are ai j, use subscript notation to write (a) the first pivot. (b)
Chapter 1, Problem 1.4.9(choose chapter or problem)
If the entries of A are ai j, use subscript notation to write (a) the first pivot. (b) the multiplier `i1 of row 1 to be subtracted from row i. (c) the new entry that replaces ai j after that subtraction. (d) the second pivot.
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