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={2,5,8}, ={1,3,5,7},则(∁U.A.)∩B等于( ) A.{5}B.{1,3,7} {2,8} {1,3,4,5,6,7,8}
={1,3,5,7}, ={2,4,5},则∁U.(A.∪B.)=( ) A.{6,8}B.{5,7} {4,6,7} {1,3,5,6,8}
={1,3,5,7}, ={2,4,5}则∁U.(A.∪B.)=( ) A.{6,8} B.{5,7} {4,6,7} {1,3,5,6,8}
{2} {4,6} {1,3,5} {4,6,7,8}
{2} {4,6} {1,3,5} {4,6,7,8}
{2,5} {3,6} {2,5,6} {2,3,5,6,8}
{5,7} {2,4} {2,4,8} {1,3,5,6,7}
={1,3,5,7}, ={2,4,5}则∁U.(A.∪B.)( ) A.{6,8}B.{5,7} {4,6,7} {1,3,5,6,8}
M.∪N. M.∩N. (∁I.M.)∪(∁I.N.) (∁I.M.)∩(∁I.N.)
{1,2,3,4,5,6} {7,8} {3,4} {1,2,5,6,7,8}
{2,4,7,8} {1,3,5,6}
∅ {2,4,7,8} {1,3,5,6} {2,4,6,8}
{1} {3,5} {1,2,4,6} {1,2,3,4,5}
{3} {1,2,3,4,6}
{1,2,3,4,5,6,7,8} {5,7,8}
={1,3,5,7}, ={2,5},则∁U.(A.∪B)等于( ) A.{6,8}B.{5,7} {4,6,8} {1,3,5,6,8}
={2,3,5,6},集合 ={1,3,4,6,7},则集合=( ) A.{2,5} B.{3,6} {2,5,6} {2,3,5,6,8}
={1,2,3,5}, ={2,4,6},则图中的阴影部分表示的集合为( ) A.{2}B.{4,6} {1,3,5} {4,6,7,8}
{2} {4,6} {1,3,5} {4,6,7,8}