Sample First Long Exam_math17_2010-2011 (1)

# Sample First Long Exam_math17_2010-2011 (1) - MATH 17-1st...

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MATH 17-1 st Semester 2010-2011 First Long Examination (Sample) PART 1. For multiple choice items, give only the (capital) letter of the correct answer. Otherwise, provide the answer. 1. Which of the following is true? A. A ∈ {{ܣ}} B. φ ⊂ { } C. φ∈℘ ( (ܣ)) D. ( ) ⊆φ 2. Which of the following is true? A. ( ) ( ) B A A B B A = C. ( ) C C C B A B A = B. ( ) ( ) B A B A A D. A B B A × = × 3. Consider the operation * defined as a ∗ ܾ = ܽȁܾȁ ݋݊ ܼ . Which of the following is NOT true? A. Z is closed under *. B. * is commutative in Z C. * is associative in Z D. If a>0, ܽ ∗ ܾ ≥ 0 For numbers 4-5, consider the following addition and multiplication tables for S 4 ={0,1,2,3}. + 0 1 2 3 0 0 1 2 3 1 1 2 3 0 2 2 3 0 1 3 3 0 1 2 4. If ݔ+ 3 = 3 × 2+ 2 × (−2), then x = _______. 5. What is the best description for the system ,+ ] ? A. It is a group. C. It is a commutative ring with identity. B. It is a ring.

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## This note was uploaded on 07/29/2011 for the course CAS 17 taught by Professor A during the Fall '10 term at University of the Philippines Los Baños.

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Sample First Long Exam_math17_2010-2011 (1) - MATH 17-1st...

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