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高一数学必修一集合试卷及答案
一、选择题(每小题3分,共30分)
1.若集合A={1,2,3,4},B={2,3,4,5},则A∩B={ A. {1,2,3,4} B. {2,3,4} C. {1,2,3,4,5} D. {1,5}
答案:B. {2,3,4}
2.若集合A={x|x是偶数},B={x|x是质数},则A∩B={
A. {2,4,6,8} B. {2,3,5,7} C. {2,4,6,8,3,5,7} D. {2,3,4,5,6,7,8}
答案:B. {2,3,5,7}
3.若集合A={x|x是正整数},B={x|x是质数},则A∪B={
A. {2,3,4,5,6,7,8} B. {1,2,3,5,7} C. {1,2,3,4,5,6,7,8} D. {2,3,5,7}
答案:C. {1,2,3,4,5,6,7,8}
4.若集合A={x|x是正整数},B={x|x是偶数},则A∩B={ A. {2,4,6,8} B. {2,3,5,7} C. {2,4,6,8,3,5,7} D. {2,3,4,5,6,7,8}
答案:A. {2,4,6,8}
二、填空题(每小题3分,共30分)
5.若集合A={1,2,3,4},B={2,3,4,5},则A∪B=________
答案:{1,2,3,4,5}
6.若集合A={x|x是正整数},B={x|x是质数},则A∩B=________
答案:{2,3,5,7}
7.若集合A={x|x是正整数},B={x|x是偶数},则A∪B=________
答案:{2,3,4,5,6,7,8}
8.若集合A={1,2,3,4},B={2,3,4,5},则A-B=________
答案:{1}
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