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(3) 完成以下集合运算并用韦恩图表示:
设 A= {0,1,2},B={0,1,{2}},C={4,5},表示并计算以下运算:
1. [练习 21] A ∩ B

解答:
A ∩ B= {0, 1}
2. [练习 22] A ∪ B

解答:
A ∪ B={0,1,2, {2}}
3. [练习 23]A -C
4. [练习 24] A ∪ B ∪ C
5. [练习 25] A ∩ (B ∪ C)

解答:
A ∩ (B ∪ C)={0,1}
6. [练习 26] (B ∪ C ) - (A ∩ B )
7. [练习 27] P (A) ∩ B

解答:
P (A) ∩ B={{2}}
8. [练习 28] A ∪ (B ∩ C)- A ∩ (B ∪ C)
9.[练习 29] A ∩ A - A ∪ A

10. [练习 30] [A ∪ (B ∩ C)- A ∩ (B ∪ C)] - [(B ∪ C ) - (A ∩ B )]
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