设全集U={x|0≤x<10,x∈N*},集合A={2,4,6,8},则CUA=( )A.{0,1,3,5,7}B.{0,1,3,5,7,9}C.{1,3,5
题型:单选题难度:简单来源:不详
设全集U={x|0≤x<10,x∈N*},集合A={2,4,6,8},则CUA=( )A.{0,1,3,5,7} | B.{0,1,3,5,7,9} | C.{1,3,5.7} | D.{1,3,5,7,9} |
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答案
根据题意,设全集U={x|0≤x<10,x∈N*}={1,2,3,4,5,6,7,8,9}, 而A={2,4,6,8}, 则∁UA={1,3,5,7,9}, 故选D. |
举一反三
已知集合M={-1,1},N={x|<2x+1<4,x∈Z},则M∩N=( )A.{-1,1} | B.{-1} | C.{0} | D.{-1,0} |
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若函数f(x)=的定义域为A,函数g(x)=lgx,x∈[1,10]的值域为B,则A∩B为( )A.(-∞,1] | B.(-∞,1) | C.[0,1] | D.[0,1) |
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设集合A={1,4,x},B={1,x2}且A∪B={1,4,x},则满足条件的实数x的个数是( ) |
设集合A={1,2,a},B={1,a2},若A∪B=A,则实数a的可能取值有( ) |
已知全集U={1,2,3,4,5,6},集合M={2,3,5},N={4,5},则CU(M∪N)等于( )A.{1,3,5} | B.{2,4,6} | C.{1,5} | D.{1,6} |
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