设集合P={3,log2a},Q={a,b},若P∩Q={0},则P∪Q=[ ]A.{3,0}B.{3,0,1}C.{3,0,2}D.{3,0,1,2}
题型:单选题难度:简单来源:山西省月考题
设集合P={3,log2a},Q={a,b},若P∩Q={0},则P∪Q= |
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A.{3,0} B.{3,0,1} C.{3,0,2} D.{3,0,1,2} |
答案
B |
举一反三
设集合P={3,log2a},Q={a,b},若P∩Q={0},则P∪Q= |
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A. {3,0} B. {3,0,1} C. {3,0,2} D. {3,0,1,2} |
设集合M={x|x2﹣x<0},N={x 题型:x|<2},则 |
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A. M∩N= B. M∩N=M C. M∪N=M D. M∪N=R |
难度:|
查看答案 若集合A={x|x2﹣2x﹣8<0},B={x|x﹣m<0}. (1)若m=3,试求A∩(RB); (2)若A∩B=,求实数m的取值范围; (3)若A∩B=A,求实数m的取值范围. |
已知集合 ,Q={y|x2+y2=4,x,y∈R},则P∩Q= |
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A.{﹣2,1} B. C. D.Q |
己知A={x|y= },B={y|y=x2﹣2},,则A∩B= |
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A. [0,+∞) B. [﹣2,2] C. [﹣2,+∞) D. [2,+∞) |