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Suppose that A is an m n matrix and B is an n l matrix. Further suppose that the ith row of A is a
Suppose that A is an m n matrix and B is an n l matrix. Further suppose that the ith row of A is a zero row. We are going to prove that the ith row of C = AB is also a zero row. Hint: Let j be a positive integer between 1, 2, . . . , l. What does cij looks like in terms of the entries of A and B
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