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Unformatted text preview: 23 21 M P E = does both operations at once? Problem 3: The following matrix needs 3 elimination matrices. What are they? Write both the notation of the matrix (that is, ij E ) and the matrix itself. 2 1 1 2 1 1 2 1 1 2 A = (i) (ii) (iii) 3 Problem 4: Let 2 3 8 9 A = . a) Find the LU decomposition of A. L = U = b) Find the LDU decomposition of A. L = D = U = Problem 5: Let 2 1 2 2 1 R = . T R = T RR = Circle the matrices that are symmetric: T T T R R RR R R...
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