1 -5 -3 1 5 -25 4 -11 We want to determine if the columns of A span R³. Let A = -2 LO To check this we add We then add We then add We conclude that times the first row to the second. times the first row to the third. times the new second row to the new third row. OA. The columns of A do span R³. B. The columns of A do not span R³. OC. We cannot tell if the columns of A span R³.

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