Let U be an n m matrix in echelon form, with the bottomk rows of U having all zero
Chapter 3, Problem 70(choose chapter or problem)
Let U be an n m matrix in echelon form, with the bottomk rows of U having all zero entries. Suppose that L1 and L2 areboth n n matrices and that the leftmost n k columns of bothare identical. Prove that L1U = L2U.
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