Consider the upper triangular 3 x 3 matrixa b c ' A = 0 d e 0 0 /
Chapter 2, Problem 35(choose chapter or problem)
Consider the upper triangular 3 x 3 matrixa b c ' A = 0 d e 0 0 / R*whiehvaluesofa,,c,d,,and / is A invertible? k ^ te.y DcraUy when is an upper triangular matrix (of tAifiary size) invertible? ^ if _ __ upper triangular matrix is invertible, is its intone an upper triangular matrix as well? b a lower triangular matrix invertible?
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