全集U={x|1≤x≤9,x∈Z},A={1,2,3},B={3,4,5,6},则CU(A∪B)=______.
题型:填空题难度:一般来源:不详
全集U={x|1≤x≤9,x∈Z},A={1,2,3},B={3,4,5,6},则CU(A∪B)=______. |
答案
根据题意,全集U={1,2,3,4,5,6,7,8,9}, 由A={1,2,3},B={3,4,5,6}, 则A∪B={1,2,3,4,5,6}, 有∁U(A∪B)={7,8,9}; 故答案为{7,8,9} |
举一反三
设集合A={1,3},集合B={1,2,4,5},则集合A∪B=______. |
设集合M={x∈R|x2-3x-10<0},N={x∈Z|∈Z},则M∩N为( )A.[1,2] | B.(1,2) | C.{-1,1,2} | D.{-2,-1,1,2} |
|
已知集合A={(x,y)|x+y=0,x,y∈R};B=[(x,y)|x-y=0,x,y∈R],则集合A∩B=( )A.(0,0) | B.x=0∪y=0 | C.0 | D.{(0,0)} |
|
已知A={x|x2>9},B={x|≥0},C={x 题型:x-2|<4} (1)A∩B,A∪C (2)A∩Cu(B∩C) |
难度:|
查看答案 设集合A={y|y=2x+1},全集U=R,则CUA为( )A.(1,+∞) | B.[1,+∞) | C.(-∞,1) | D.(-∞,1] |
|