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quiz_04sle_gaussianelimination

# quiz_04sle_gaussianelimination - Multiple-Choice Test...

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04.06.1 Multiple-Choice Test Chapter 04.06 Gaussian Elimination 1. The goal of forward elimination steps in the Naïve Gauss elimination method is to reduce the coefficient matrix to a (an) _____________ matrix. (A) diagonal (B) identity (C) lower triangular (D) upper triangular 2. Division by zero during forward elimination steps in Naïve Gaussian elimination of the set of equations [ ][ ] [ ] C X A = implies the coefficient matrix [ ] A (A) is invertible (B) is nonsingular (C) may be singular or nonsingular (D) is singular 3. Using a computer with four significant digits with chopping, the Naïve Gauss elimination solution to 23 . 47 123 . 7 239 . 6 12 . 58 23 . 55 0030 . 0 2 1 2 1 = = + x x x x is (A) ; 66 . 26 1 = x 051 . 1 2 = x (B) ; 769 . 8 1 = x 051 . 1 2 = x (C) ; 800 . 8 1 = x 000 . 1 2 = x (D) ; 771 . 8 1 = x 052 . 1 2 = x 4. Using a computer with four significant digits with chopping, the Gaussian elimination with partial pivoting solution to 23 . 47 123 . 7 239 . 6 12 . 58 23 . 55 0030 . 0 2 1 2 1 = = + x x x x is

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