

<img src="http://test.gewuxue.com/static/img_exam/2111_556.png" >
若集合M <img src="http://test.gewuxue.com/static/img_exam/2111_536.png" width="'16'" height="'16'" ><img src="http://test.gewuxue.com/static/img_exam/2111_537.png" width="'12'" height="'19'" >{1,2,3},且M中至少有2个元
设<img src="http://test.gewuxue.com/static/img_exam/2111_561.png" width="'145'" height="'22'" >,则满足条件的集合<img src="http://test.gewuxue.com/static/img_exam/2111_562.png" width="'16'" height="'17'" >共有()个
含有三个实数的集合可表示为<img src="http://test.gewuxue.com/static/img_exam/2111_538.png" width="'55'" height="'41'" >,也可表示为<img src="http://test.gewuxue.com/static/img_exam/2111_539.png" width="'81'" height="
设<img src="http://test.gewuxue.com/static/img_exam/2111_563.png" width="'40'" height="'21'" >为实数,<img src="http://test.gewuxue.com/static/img_exam/2111_564.png" width="'348'" height="'24'" >。记集合<img src="http:/
集合A={0,2,a},B={1,a2},若A∪B={-4,0,1,2,16},则a的值为( )
若全集<img src="http://test.gewuxue.com/static/img_exam/2111_577.png" width="'175'" height="'27'" >,则集合<img src="http://test.gewuxue.com/static/img_exam/2111_578.png" width="'16'" height="'17'" >的真子集共有( )
若<img src="http://test.gewuxue.com/static/img_exam/2111_543.png" width="'228'" height="'31'" >中只有一个元素,则实数k的值为( )
设集合<img src="http://test.gewuxue.com/static/img_exam/2111_583.png" >是实数集<img src="http://test.gewuxue.com/static/img_exam/2111_584.png" >的子集,如果点<img src="http://test.gewuxue.com/static/img_exam/2111_585.png" >满足:
集合<img src="http://test.gewuxue.com/static/img_exam/2111_545.png" width="'43'" height="'23'" >的真子集共有( )