The linear system x 1 x 3 = 0.2, 1/2 x 1 + x 2
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The linear system x1 − x3 = 0.2, −1/2 x1 + x2 – 1/4 x3 = −1.425, x1 – 1/2 x2 + x3 = 2. Has the solution (0.9,−0.8, 0.7)t .
a. Is the coefficient matrix
Strictly diagonally dominant?
b. Compute the spectral radius of the Gauss-Seidel matrix Tg.
c. Use the Gauss-Seidel iterative method to approximate the solution to the linear system with a tolerance of 10−2 and a maximum of 300 iterations.
d. What happens in part (c) when the system is changed to x1 − 2x3 = 0.2, −1/2 x1 + x2 – 1/4 x3 = −1.425, x1 – 1/2 x2 + x3 = 2.
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