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4. For given equations 10x+2x2 x3 = 27 - -3x1-5x2+2x3 = -61.5 x1+x2+6x3=-21.5 (a) solve by naive Gauss elimination. (b) Solve by LU factorization.

4. For given equations 10x+2x2 x3 = 27 - -3x1-5x2+2x3 = -61.5 x1+x2+6x3=-21.5 (a) solve by naive Gauss elimination. (b) Solve by LU factorization. (c) Solve by iterative method.

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