Quiz_04sle_backgroun - Multiple-Choice Test Chapter 04.01 Background Simultaneous Linear Equations 1 6 0 Given[A = 0 0(A(B(C(D 2 2 1 0 0 3 2 4 0 9

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04.01.1 Multiple-Choice Test Chapter 04.01 Background Simultaneous Linear Equations 1. Given [ ] A = 6 0 0 0 5 4 0 0 3 2 1 0 9 3 2 6 then [ ] A is a (an) ______________ matrix. (A) diagonal (B) identity (C) lower triangular (D) upper triangular 2. A square matrix [ ] A is lower triangular if (A) i j a ij > = , 0 (B) j i a ij > = , 0 (C) j i a ij > , 0 (D) i j a ij > , 0 3. Given = 3 . 12 3 . 11 3 . 10 3 . 11 3 . 10 3 . 11 3 . 20 3 . 12 3 . 12 ] [ A , = 20 11 6 5 4 2 ] [ B then if [ ] [ ][ ] B A C = , then = 31 c _____________________ (A) 2 . 58 (B) 6 . 37 (C) 219.4 (D) 259.4
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