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{1,2,3} {0,1,2,3} {2} {﹣1,0,1,2,3}
={-1,3,5},若f:x→2x-1是集合A.到集合 的映射,则集合B.可以是( ) A.{0,2,3}B.{1,2,3} {-3,5} {-3,5,9}
{1} {1,2} {1,2,3} {1,2,3,4}
{1,2,3} {0,2,3} {﹣3,5,9} {﹣3,5}
={1,2,3}, ={4,5},M={x|x=a+b,a∈A,b∈B},集合M.真子集的个数为( )A.32B.31 16 15
{-2,-1,0,1,2,3} {-2,-1,0,1,2} {1,2,3} {1,2}
={x|(x-1)(x+2)=0}; ={x|(x+2)(x-3)=0},则集合A.∪B.是( ) A.{-1,2,3} B.{-1,-2,3} {1,-2,3} {1,-2,-3}
={-1,3,5},若f:x→2x-1是集合A.到集合 的映射,则集合B.可以是 ( ) A.{-3,5,9 , 10}B.{1,2,3} {-3,5} {0,2,3}
{1,2,3, 5} ф {0} {1,3,5,7, 11, 13, 17, 19}
={x|x2﹣4<0}, ={1,2,3},则A∩B.=( ) A.{1,2,3} B.{1,2} {1} {2}
{1,2,3} {2,3} {1,2} {2,3,4}
{2} {1,2,3} {﹣1,0,1,2,3} {0,1,2,3}
{0} {0,3} {0,1,3} {1,2,3}
={x|(2x+1)(x-3)<0}, ={x∈N*|x≤5},则A.∩B.是( ) A.{1,2,3}B.{1,2} {4,5} {1,2,3,4,5}
={1,2,3}, ={x|﹣1<x<3,x∈Z.},则A.∪B.等于( ) A.{1}B.{1,2} {0,1,2,3} {1,2,3}
={1,2}, ={1,2,3},C={2,3,4}则 ( ) (A.) {1,2,3} (B.) {1,2,4} ( ) {2,3,4} ( ) {1,2,3,4}
={1,2,3}, ={2,3,4},则A.∪B.=( ) A. {1,2,3,4} B. {1,2,3} {2,3,4} {1,3,4}
={2,3},集合 ={0,1},则A.∪B.等于( ) A.∅ B.{1,2,3} {0,1,2} {0,1,2,3}