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How many rows of A contain a pivot position? Does the equation Ax = b have a solution for each b in R^? 1

How many rows of A contain a pivot position? Does the equation Ax = b have a solution for each b in R^? 1 3 -7 11 -2 -2 4 -2 A = 0-2 5 - 10 2 01 -6 How many rows of A contain a pivot position? A has rows which contain a pivot position.

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