Question: 1. Operation 3: Change the first row by adding to it 1/2 times the second row. 2. Operation 3: Change the third row by adding

1. Operation 3: Change the first row by adding to it 1/2 times the second row.
ВНI 4

2. Operation 3: Change the third row by adding to it (-4) times the second row.

9 1 -2 4 5.

Perform the indicated elementary row operation and give its abbreviation.

I 4 9 1 -2 4 5.

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