Question: PROBLEM 4 Let A be a 4 x 5 matrix. Suppose that every row of A is a scalar multiple of the first row of

PROBLEM 4 Let A be a 4 x 5 matrix. Suppose that every row of A is a scalar multiple of the first row of A. If the first row of A is nonzero (that is, it has at least one nonzero number), then the the rank of A is (a) 1 (b) 2 (c) 3 (d) 4 (e) none of these

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