Question: Write matrix in the form A=XLU by using method Doolittle, where X is a permutation matrix and L, U lower and upper triangular matrices correspondingly.

Write matrix Write matrix in the form A=XLU by using method Doolittle, where X in the form A=XLU by using method Doolittle, where X is a permutation matrix and L, U lower and upper triangular matrices correspondingly. For k=1,2,.....,n, we have ,

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