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1. Use LU-factorization method. Find the solution of the linear system x + 2x + 4x3 = 3, 3x+8x2 + 14x3 = 13, 2x

1. Use LU-factorization method. Find the solution of the linear system x + 2x + 4x3 = 3, 3x+8x2 + 14x3 = 13, 2x + 6x2 + 13x3 = 4.

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