乃 Exercise 22: Recall a matrix A = [a;;] = Mon (F) I is ·S-S. ما Mnan upper - triangular if aij = 0 where izj lover - triangular if ajj = where izj diagonal if aij =0 where i 260 للتأميلة 0 Fg. Show that if A is one of these 3 types of matrices, then det (A) = 0₁, 022 C. Onn, SJ Jab F

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