Question: 3 -2 1 1 2 -3 2 -4 4 How many non-zero rows does RREF(A) have? Does the equation AX = b have a

3 -2 1 1 2 -3 2 -4 4 How many non-zero

3 -2 1 1 2 -3 2 -4 4 How many non-zero rows does RREF(A) have? Does the equation AX = b have a solution for all b E R? Do the columns A span R

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