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第五章习题答&

第五章习题答&

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8 P151 P153 1 11 1 21 {-31 2} 1 41 {51 61 71 81 91 101 111 121 131 141 15} 21 1 21 {x | x 1 10 < x < 20} 1 41 {x | x } 1 61 {x | x=2k+11 k I} 31 1 x } 1 11 41 1 61 7 21 31 51 8 41 x } I1 1 A=G1 B=E1 C=F 6 1 21 1 1 {11 1 }1 ={ {1}1 { }1 {11 1 }} 1 41 1 1 { {a}1 { }}1 ={ { }1 {{a}}1 {{ }}1 { {a}}1 { { }}1 {{a}1 { }}1 { {a}1 { }}} 71 1 .{ 11 21 31 6 μ 41 51 81 A1 B1 C μ A B1 B C1 A C μ A={a} 1 B={{a}} 1 C={{{a}}} 1 A B1 B C1 A C 1
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101 U={11 21 31 41 5}1 A={11 4}1 B={11 21 5}1 C={21 4} E 4 1 81 1 1 A1 1 1 C1 1 1 1 A1 1 1 C1 ={ {1}1 {4}1 {11 4}} - { {2}1 {4}1 {21 4}} ={{1}1 {11 4}} 11E 4 1 11 A - B C1 =1 A - B1 1 1 A - C1 1 21 1 A - B1 1 B= 11 A - B C1 = A ∩∼ B C1 = A B ∪∼ C1 =1 A ∩∼ B1 1 1 A ∩∼ C1 =1 A - B1 1 1 A - C1 1 21 A - B1 1 B =1 A ∩∼ B1 1 B = A B B1 = 121 A1 B1 C x } 1 11 A - B1 1 1 A - C1 =A 1 21 A - B1 1 1 A - C1 = 11 A - B1 1 1 A - C1
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= 1 A ∩∼ B1 1 1 A ∩∼ C1 = A B ∪∼ C1 = A ∩∼ B C1 = A - B C1 1 A - B1 1 1 A - C1 =A 1 A - B C1 =A 1 1 4 A B C1 = 21 1 1 4 A - B1 1 1 A - C1 =A - B C1 1 A - B1 1 1 A - C1 = 1 A - B C1 = 5.11 1 A B C1 13. 1
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