Students frequently perform the following type of calculation to introduce a zero into a matrix. 4R₂ - 3R₁ [41] 3 6 4 1 0 21 However, 4R₂ - 3R₁ is not an elementary row operation. Why not? 4R₂ - 3R₁ is not an elementary row operation since it does not include the interchanging of two rows. elementary row operation since the coefficient of R₁ is -4. 1 O 4R₂ - 3R₂ is not an 4R₂ - 3R, is not an 4R2 - 3R₁ is not an elementary row operation since the coefficient of R₂ is -3. elementary row operation since the coefficient of R₁ is 3. 4R₂ - 3R, is not an elementary row operation since the coefficient of R₂ is 4. Show how to achieve the same result using elementary row operations. O Perform the elementary row operation R₂ 3 4 First perform the elementary row operation R₂-R₁, then perform 3R. O First perform the elementary row operation R₂ - 3R₁, then perform 4R₂. O First perform the elementary row operation R₂ then perform 4R₂- 3 4 Perform the elementary row operation R₂ -₁. "

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Students frequently perform the following type of calculation to introduce a zero into a matrix.
4R₂ - 3R₁
[41]
3 6
4 1
0 21
However, 4R₂ - 3R₁ is not an elementary row operation. Why not?
4R₂ - 3R₁ is not an elementary row operation since it does not include the interchanging of two rows.
elementary row operation since the coefficient of R₁ is -4.
1
O 4R₂ - 3R₂ is not an
4R₂ - 3R, is not an
4R2 - 3R₁ is not an
elementary row operation since the coefficient of R₂ is -3.
elementary row operation since the coefficient of R₁ is 3.
4R₂ - 3R, is not an elementary row operation since the coefficient of R₂ is 4.
Show how to achieve the same result using elementary row operations.
O Perform the elementary row operation R₂
3
4
First perform the elementary row operation R₂-R₁, then perform 3R.
O First perform the elementary row operation R₂ - 3R₁, then perform 4R₂.
O First perform the elementary row operation R₂
then perform 4R₂-
3
4
Perform the elementary row operation R₂ -₁.
"
Transcribed Image Text:Students frequently perform the following type of calculation to introduce a zero into a matrix. 4R₂ - 3R₁ [41] 3 6 4 1 0 21 However, 4R₂ - 3R₁ is not an elementary row operation. Why not? 4R₂ - 3R₁ is not an elementary row operation since it does not include the interchanging of two rows. elementary row operation since the coefficient of R₁ is -4. 1 O 4R₂ - 3R₂ is not an 4R₂ - 3R, is not an 4R2 - 3R₁ is not an elementary row operation since the coefficient of R₂ is -3. elementary row operation since the coefficient of R₁ is 3. 4R₂ - 3R, is not an elementary row operation since the coefficient of R₂ is 4. Show how to achieve the same result using elementary row operations. O Perform the elementary row operation R₂ 3 4 First perform the elementary row operation R₂-R₁, then perform 3R. O First perform the elementary row operation R₂ - 3R₁, then perform 4R₂. O First perform the elementary row operation R₂ then perform 4R₂- 3 4 Perform the elementary row operation R₂ -₁. "
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