An m ×n upper triangular matrix is one whose entries below the main diagonal are 0's (as in Exercise 8). When is a square upper triangular matrix invertihle? Jastify your answer. | Numerade
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SOLVED: Matrix U = (Uij) is upper triangular if Uij > j, that is, when all the entries below the main diagonal are zero. Matrices below are upper triangular.Find the products A^2 and AB. Are these products upper triangular?AB =
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