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习题五答案

习题五答案

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1 4 1 2 1 {-3 1 2} 4 1 {5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15} 2 1 2 1 {x | x 1 10 < x < 20 } 1 4 1 {x | x 4 B } 1 6 1 {x | x=2k+1 1 k I} 4. = 4 I 1 1 A=G 1 B=E 1 C=F 4 B
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5. 4E 1 1 2 1 1 1 {1} 1 {{2 1 3}} 1 {1 1 {2 1 3} } 1 4 1 1 1 { } 1 6 1 {{1 1 2} 1 {2 1 1 1 1} 1 {2 1 1 1 1 1 2}}={{1 1 2}} 1 1 {{1 1 2}} 6 1 2 1 1 1 {1 1 1 } 1 ={ {1} 1 { } 1 {1 1 1 }}
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10 1 U={1 1 2 1 3 1 4 1 5} 1 A={1 1 4} 1 B={1 1 2 1 5} 1 C={2 1 4}B 1 8 1 1 1 A 1 1 1 C 1 1 1 1 A 1 1 1 C 1 ={ {1} 1 {4} 1 {1 1 4}} - { {2} 1 {4} 1 {2 1 4}} ={{1} 1 {1 1 4}}
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17. 1 1 (A) 1 1 (B) 1 A 1 B 1 x x A {x} A {x} P 1 A 1 {x} P(B) 1 1 (A) 1 1 (B) 1 {x} B x B 1 A=B
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11 1 1 A - B C 1 = 1 A - B 1 1 1 A - C 1 2 1 A - B 1 1 B= 3 1 A B C 1 = 1 A B 1 1 1 A C 1 1 4 1 A A - B 1 = A - B 1 1 1 A - B C 1 = A ∩∼ B C 1 = A B ∪∼ C 1 = 1 A ∩∼ B 1 1 1 A ∩∼ C 1 = 1 A - B 1 1 1 A - C 1 ± μª
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2 1 A - B 1 1 B= 1 A ∩∼ B 1 1 B = A B B 1 = 3 ± x x A B C 1 x A x B C x A x B x C 1 1 1 x A x B 1 1 1 x A x
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