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5. Let A be an m x n matrix. Recall that the null space of a matrix A, written null(A), is the set of all R" such that Ax 0. Show that null(A) is a subspace of Rn.
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5. Let A be an m x n matrix. Recall that the null space of a matrix A, written null(A), is the set of all R" such that Ax 0. Show that null(A) is a subspace of Rn.
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Amr Elnashar
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