In Exercises 12, classify the matrix as upper triangular, lower triangular, or diagonal
Chapter 1, Problem 2(choose chapter or problem)
In Exercises 12, classify the matrix as upper triangular, lower triangular, or diagonal, and decide by inspection whether the matrix is invertible. [Note: Recall that a diagonal matrix is both upper and lower triangular, so there may be more than one answer in some parts.](a) 4 0 1 7 (b) 0 3 0 0 (c) 400 0 3 5 0 0 0 2 (d) 300 310 700 In
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