Consider the following Gauss elimination:
A→[[1,0,0],[0,0,1],[0,1,0]]E1→[[1,0,0],[0,1,0],[0,0,2]]E2E1A→[[1,0,0],[0,4,0],[0,0,1]]
Which operation is performed in the first step?
a) Row interchange between the first and second rows.
b) Multiplying the first row by 2.
c) Multiplying the second row by 0.
d) Swapping the first and third columns.
