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{1,2,3,4,6} {1,2,3,4,5} {1,2,5} {1,2}
={1,3},则 A. {1,3} {2,4,5} {1,2,3,4,5}
{1,2,3,4,6} {1,2,3,4,5} {1,2,5} {1,2}
=(1,2,5},∁U. =(1,3,5},则A.∩B.=( ) A.{2}B.{5} {1,2,4,5} {3,4,5}
{3} {4,5} {3,4,5} {1,2,4,5}
M.∪N. M.∩N. (∁I.M.)∪(∁I.N.) (∁I.M.)∩(∁I.N.)
{2} {5} {1,2,4,5} {3,4,5}
{1,2,3,5} {1,2,3,4} {2,3} {1}
{1,2,3} {3,4,5} {1,2} {4,5}
{4} {2,3,4,5} {1,3,4,5} ∅
{1,2,3} {1,3,5} {1,4,5} {2,3,4}
={x|x≥3}, ={1,2,3,4,5}则A.∩B.=( ) A.{1,2,3}B.{2,3,4} {3,4,5} {1,2,3,4,5}