
已知集合<img src="http://test.gewuxue.com/static/img_exam/2111_199.png" width="'168'" height="'23'" >,<img src="http://test.gewuxue.com/static/img_exam/2111_200.png" width="'139'" height="'23'" >,且<img src="http://test
设<img src="http://test.gewuxue.com/static/img_exam/2111_233.png" width="'16'" height="'17'" >、<img src="http://test.gewuxue.com/static/img_exam/2111_234.png" width="'16'" height="'21'" >为两个非空实数集合,定义集合
影部分所表示的集合是<img src="http://test.gewuxue.com/static/img_exam/2111_169.png" width="'125'" height="'68'" >
设全集<img src="http://test.gewuxue.com/static/img_exam/2111_207.png" width="'281'" height="'24'" >,则图中阴影部分表示的集合为( )<img src="http://test.gewuxue.com/static/img_exam/2111_208.png" width="'109'" height="
设集合A={1,2,3,4},B={3,4,5},全集U=A∪B,则集合?U(A∩B)的元素个数为( )
已知集合<img src="http://test.gewuxue.com/static/img_exam/2111_170.png" width="'200'" height="'24'" >且<img src="http://test.gewuxue.com/static/img_exam/2111_171.png" width="'16'" height="'17'" ><img src="http://test.gewuxu
定义集合A、B的一种运算:<img src="http://test.gewuxue.com/static/img_exam/2111_213.png" width="'243'" height="'24'" >,若<img src="http://test.gewuxue.com/static/img_exam/2111_214.png" width="'68'" height="'20'" >,<
设集合M={-1,0,1},N={a,a<sup>2</sup>},则使M∩N=N成立的a的值是( )
已知集合<img src="http://test.gewuxue.com/static/img_exam/2111_180.png" >={2,0,1,4},<img src="http://test.gewuxue.com/static/img_exam/2111_181.png" >={<img src="http://test.gewuxue.com/static/img_exam/2111_182.png" >|<img src="h
已知集合<img src="http://test.gewuxue.com/static/img_exam/2111_217.png" width="'128'" height="'32'" >,且<img src="http://test.gewuxue.com/static/img_exam/2111_218.png" width="'36'" height="'17'" >,则实数<img src="htt