Suppose that you are solving a system of 4 linear equations in 4 variables by the row echelon method. If you use the transformation $2 R _ { 1 } + R _ { 2 }$, which row or rows of the augmented matrix, if any, will change?
A) Rows 1 and 2
B) Row 1
C) Row 2
D) None

Question

Quizplus · Accepted Answer

The transformation $2 R _ { 1 } + R _ { 2 }$ specifically targets Row 2 by adding twice the first row to it. This operation does not alter Row 1 or any other row, hence only Row 2 changes.

Suppose That You Are Solving a System of 4 Linear 2R1+R22 R _ { 1 } + R _ { 2 }2R1​+R2​

Suppose That You Are Solving a System of 4 Linear $2 R _ { 1 } + R _ { 2 }$