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0. Let A, B be fuzzy numbers, ∪m, ∩m denote standard fuzzy union and intersection respectively and, ∪a, ∩a denote algebraic sum fuzzy union and algebraic product fuzzy intersection. Which of the following is/are fuzzy numbers? 1. A, with standard complement 2. A ∩m B 3. A ∪m B 4. A ∪a B 5. A ∩a B
2 and 3
1 and 4
3, 4 and 5
None of the above
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