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Statement of a problem № m53558

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Determine which matrices in Exercise 1 are tri diagonal and positive definite. Repeat Exercise 1 for these matrices using the optimal choice of ω. In Exercise 1 a. 3x1 − x2 + x3 = 1, 3x1 + 6x2 + 2x3 = 0, 3x1 + 3x2 + 7x3 = 4. b. 10x1 − x2 = 9, −x1 + 10x2 − 2x3 = 7, − 2x2 + 10x3 = 6. c. 10x1 + 5x2 = 6, 5x1 + 10x2 − 4x3 = 25, − 4x2 + 8x3 − x4 = −11, − x3 + 5x4 = −11. d. 4x1 + x2 + x3 + x5 = 6, −x1 − 3x2 + x3 + x4 = 6, 2x1 + x2 + 5x3 − x4 − x5 = 6, −x1 − x2 − x3 + 4x4 = 6, 2x2 − x3 + x4 + 4x5 = 6




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