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8. Use Gaussian elimination to find the values of a for which the equation system xty - 2z = a+7 3x - y + az

8. Use Gaussian elimination to find the values of a for which the equation system xty - 2z = a+7 3x - y + az = -3 -x + ay - 4z = 8 has (i) exactly solution; (ii) more than one solution; (iii) no solution

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