For all sets A, B, and C, if A C B and BnC = 0 then An C = 0. Construct a proof for the statement by selecting sentences from the following scrambled list and putting them in the correct order. Use the element method for proving that a set equals the empty set. Then by definition of intersection and complement A = U. Then (An c) = U. By definition of intersection x E A and x e C. Hence x e BN c by definition of intersection. Therefore A B. Thus BnC+ O by definition of Ø. Then x E B because AC B. In addition, we know that x€C. Proof by contradiction: 1. Suppose that there exists sets A, B, and C such that A C B, and BnC = 0 and A n C + 0. 2. Then there exists an element x such that x E ANC. 3. -Select- 4. ---Select- 5. --Select- 6. --Select--- 7. But this contradicts the supposition. Hence the supposition is false, and so AnC = 0.
For all sets A, B, and C, if A C B and BnC = 0 then An C = 0. Construct a proof for the statement by selecting sentences from the following scrambled list and putting them in the correct order. Use the element method for proving that a set equals the empty set. Then by definition of intersection and complement A = U. Then (An c) = U. By definition of intersection x E A and x e C. Hence x e BN c by definition of intersection. Therefore A B. Thus BnC+ O by definition of Ø. Then x E B because AC B. In addition, we know that x€C. Proof by contradiction: 1. Suppose that there exists sets A, B, and C such that A C B, and BnC = 0 and A n C + 0. 2. Then there exists an element x such that x E ANC. 3. -Select- 4. ---Select- 5. --Select- 6. --Select--- 7. But this contradicts the supposition. Hence the supposition is false, and so AnC = 0.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.3: Divisibility
Problem 10TFE
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