Consider the following LU decomposition of the given matrix: 2 1 -1 2 4 5 3 6 -25-26 4 11 -4 8 L 21 0 0 0 2 1 -1 2 1 0. a 11 31 32 1 1 41 42 43 22 00 u a и 23 24 И 33 34 000 a 44

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