Part 4 of 8

Question 4 of 8

1 2

Let A = 25

.

4 7

OA [1 2 -1]

OB. [1

0-9]

OC. [1 0 0]

OD. [101]

OE. [109]

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1 Points

-1

2

and let B be the row-reduced echelon form of A. Find the first row of matrix B.