940264道相关试题

不等式http://static.haoxue.com/tk/import/20150823152123/image001.gif的解集为(  )",

A.{x|1

B.{x|x<1或x>2}

C.R

D.http://static.vko.cn/content/tk/import/20150823152123/image002.gif

不等式http://static.haoxue.com/tk/import/20150823152123/image040.gif的解集是(  )",

A.http://static.vko.cn/content/tk/import/20150823152123/image041.gif

B.http://static.vko.cn/content/tk/import/20150823152123/image042.gif

C.http://static.vko.cn/content/tk/import/20150823152123/image043.gif,或http://static.vko.cn/content/tk/import/20150823152123/image044.gif

D.http://static.vko.cn/content/tk/import/20150823152123/image045.gif,或http://static.vko.cn/content/tk/import/20150823152123/image046.gif

设变量http://static.haoxue.com/tk/import/20150823152118/image001.png,满足约束条件http://static.haoxue.com/tk/import/20150823152118/image247.png,则http://static.haoxue.com/tk/import/20150823152118/image248.png的最大值为(  )",

A.4

B.6

C.8

D.10

设全集为http://static.haoxue.com/tk/import/20150823152123/image015.gif,集合http://static.haoxue.com/tk/import/20150823152123/image197.gif,则http://static.haoxue.com/tk/import/20150823152123/image198.gif(  )",

A.http://static.vko.cn/content/tk/import/20150823152123/image199.gif

B.http://static.vko.cn/content/tk/import/20150823152123/image200.gif

C.http://static.vko.cn/content/tk/import/20150823152123/image201.gif

D.http://static.vko.cn/content/tk/import/20150823152123/image202.gif

设变量http://static.haoxue.com/tk/import/20150823152118/image001.pnghttp://static.haoxue.com/tk/import/20150823152118/image002.png满足约束条件http://static.haoxue.com/tk/import/20150823152118/image329.png,则http://static.haoxue.com/tk/import/20150823152118/image330.png的最大值为(  )",

A.http://static.vko.cn/content/tk/import/20150823152118/image006.png

B.http://static.vko.cn/content/tk/import/20150823152118/image279.png

C.http://static.vko.cn/content/tk/import/20150823152118/image331.png

D.http://static.vko.cn/content/tk/import/20150823152118/image036.png

若不等式http://static.haoxue.com/tk/import/20150823152123/image261.gif的解集为{x| x<-http://static.haoxue.com/tk/import/20150823152123/image230.gif或x>http://static.haoxue.com/tk/import/20150823152123/image262.gif},则http://static.haoxue.com/tk/import/20150823152123/image263.gif的值为(  )",

A.http://static.vko.cn/content/tk/import/20150823152123/image264.gif

B.http://static.vko.cn/content/tk/import/20150823152123/image265.gif

C.http://static.vko.cn/content/tk/import/20150823152123/image260.gif

D.http://static.vko.cn/content/tk/import/20150823152123/image266.gif

已知x,y满足http://static.haoxue.com/tk/import/20150823152118/image379.png,且目标函数z=2x+y的最大值是最小值的8倍,则实数a的值是(  )http://static.haoxue.com/tk/import/20150823152118/image380.jpg",

A.1

B.http://static.vko.cn/content/tk/import/20150823152118/image381.png

C.http://static.vko.cn/content/tk/import/20150823152118/image161.png

D.http://static.vko.cn/content/tk/import/20150823152118/image382.png

若关于http://static.haoxue.com/tk/import/20150823152123/image011.gif的不等式http://static.haoxue.com/tk/import/20150823152123/image360.gif在区间http://static.haoxue.com/tk/import/20150823152123/image361.gif上有解,则实数http://static.haoxue.com/tk/import/20150823152123/image155.gif的取值范围为 (  )",

A.http://static.vko.cn/content/tk/import/20150823152123/image362.gif

B.http://static.vko.cn/content/tk/import/20150823152123/image363.gif

C.(1,+∞)

D.http://static.vko.cn/content/tk/import/20150823152123/image364.gif

已知x,y满足约束条件http://static.haoxue.com/tk/import/20150823152118/image454.png,若z=ax+y取得最大值的最优解不唯一,则实数a的值为(  )",

A.http://static.vko.cn/content/tk/import/20150823152118/image109.png或2

B.http://static.vko.cn/content/tk/import/20150823152118/image455.png或1

C.-2或1

D.2或1

已知三个不等式:①http://static.haoxue.com/tk/import/20150823152123/image444.gif;②http://static.haoxue.com/tk/import/20150823152123/image445.gif;③http://static.haoxue.com/tk/import/20150823152123/image446.gif.要使同时满足①式和②的所有http://static.haoxue.com/tk/import/20150823152123/image011.gif的值都满足③式,则实数http://static.haoxue.com/tk/import/20150823152123/image080.gif的取值范围是(  )",

A.http://static.vko.cn/content/tk/import/20150823152123/image447.gif

B.http://static.vko.cn/content/tk/import/20150823152123/image448.gif    

C.http://static.vko.cn/content/tk/import/20150823152123/image449.gif    

D.http://static.vko.cn/content/tk/import/20150823152123/image450.gif