已知A={x|3≤x<7},B={x∈N|x<10},C={x|x<5}.则A∩B=______;CRA∪C=______.
题型:填空题难度:一般来源:不详
已知A={x|3≤x<7},B={x∈N|x<10},C={x|x<5}.则A∩B=______;CRA∪C=______. |
答案
∵A={x|3≤x<7},B={x∈N|x<10}={0,1,2,3,4,5,6,7,8,9}, ∴A∩B={3,4,5,6,7,8,9}. CRA={x|x<3,或x≥7, ∵C={x|x<5}, ∴CRA∪C={x|x<5或x≥7}. 故答案为:{3,4,5,6,7,8,9},{x|x<5或x≥7}. |
举一反三
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