Suppose columns 1, 3, 4, 5, and 7 of a matrix A are
Chapter 2, Problem 26E(choose chapter or problem)
Suppose columns 1, 3, 4, 5, and 7 of a matrix A are linearly independent (but are not necessarily pivot columns) and the rank of A is 5. Explain why the five columns mentioned must be a basis for the column space of A.
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