21–24 ▪ Elementary Row Operations Perform the indicated elementary row operation. -1 1 2 -5 2 -3 21. 3 1 1 4 22. 10 -3 1 - 20 1 -2 -1 -1 -1 3 1 8.

Linear Algebra: A Modern Introduction
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ISBN:9781285463247
Author:David Poole
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Chapter2: Systems Of Linear Equations
Section2.2: Direct Methods For Solving Linear Systems
Problem 2CEXP
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Sec11.3#21 only
21–24 - Elementary Row Operations Perform the indicated
elementary row operation.
-1
1
- 5
2 -3
3
- 20
3 1
21.
3
1
1
4
22.
10 -3
1
1 -2 -1
-1
8
Add 3 times Row 1 to
Add 2 times Row 1 to
Row 2.
Row 2.
2
1 -3
5
1
-3
23.
2
3
1
13
24.
1
6
-5 -1
7]
0 2
-1 1]
Add –3 times Row 1 to
Add -2 times Row 2 to
Row 3.
Row 3.
Transcribed Image Text:21–24 - Elementary Row Operations Perform the indicated elementary row operation. -1 1 - 5 2 -3 3 - 20 3 1 21. 3 1 1 4 22. 10 -3 1 1 -2 -1 -1 8 Add 3 times Row 1 to Add 2 times Row 1 to Row 2. Row 2. 2 1 -3 5 1 -3 23. 2 3 1 13 24. 1 6 -5 -1 7] 0 2 -1 1] Add –3 times Row 1 to Add -2 times Row 2 to Row 3. Row 3.
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