940264道相关试题

已知a,b为非零实数,且a<b,则下列命题成立的是(    )",

A.http://static.vko.cn/content/tk/import/20150823152104/image001.png<http://static.vko.cn/content/tk/import/20150823152104/image002.png

B.http://static.vko.cn/content/tk/import/20150823152104/image003.png<http://static.vko.cn/content/tk/import/20150823152104/image004.png

C.http://static.vko.cn/content/tk/import/20150823152104/image005.png<http://static.vko.cn/content/tk/import/20150823152104/image006.png

D.http://static.vko.cn/content/tk/import/20150823152104/image007.png<http://static.vko.cn/content/tk/import/20150823152104/image008.png

不等式x-y+1<0对应区域在直线x-y+1=0的(  )",

A.左上

B.左下

C.右上

D.右下

若x,y满足http://static.haoxue.com/tk/import/20150823152114/image001.png,则http://static.haoxue.com/tk/import/20150823152114/image002.png的最大值是(  )",

A.9

B.10

C.11

D.12

已知点(3,1)和(-4,6)在直线http://static.haoxue.com/tk/import/20150823152109/image038.png的两侧,则http://static.haoxue.com/tk/import/20150823152109/image020.png的取值范围是(  )",

A.http://static.vko.cn/content/tk/import/20150823152109/image039.pnghttp://static.vko.cn/content/tk/import/20150823152109/image040.png

B.http://static.vko.cn/content/tk/import/20150823152109/image041.pnghttp://static.vko.cn/content/tk/import/20150823152109/image042.png

C.http://static.vko.cn/content/tk/import/20150823152109/image043.png

D.http://static.vko.cn/content/tk/import/20150823152109/image044.png

已知实数x、y满足http://static.haoxue.com/tk/import/20150823152114/image060.png,则目标函数http://static.haoxue.com/tk/import/20150823152114/image061.png的最大值与最小值的和是(  )",

A.7

B.8

C.9

D.10

设a、b∈R,若a+|b|<0,则下列不等式中正确的是(   )",

A.a﹣b>0

B.a3+b3>0

C.a2﹣b2<0

D.a+b<0

已知实数x,y满足http://static.haoxue.com/tk/import/20150823152114/image145.png,设http://static.haoxue.com/tk/import/20150823152114/image146.png,若http://static.haoxue.com/tk/import/20150823152114/image034.png的最大值为6,则http://static.haoxue.com/tk/import/20150823152114/image034.png的最小值为(  )",

A.—3

B.—2

C.—1

D.0

若a>b,则下列不等式中恒成立的是(   )",

A.http://static.vko.cn/content/tk/import/20150823152104/image030.png>1

B.http://static.vko.cn/content/tk/import/20150823152104/image031.pnghttp://static.vko.cn/content/tk/import/20150823152104/image032.png

C.a2>b2

D.a3>b3

已知点(3,1)和(- 4,6)在直线3x-2y+a=0的两侧,则a的取值范围是(  )",

A. a<-7或 a>24

B.a=7 或 a=24

C.-7

D.-24

如果直线http://static.haoxue.com/tk/import/20150823152114/image234.pnghttp://static.haoxue.com/tk/import/20150823152114/image235.pnghttp://static.haoxue.com/tk/import/20150823152114/image236.pnghttp://static.haoxue.com/tk/import/20150823152114/image237.pnghttp://static.haoxue.com/tk/import/20150823152114/image005.png轴正半轴, http://static.haoxue.com/tk/import/20150823152114/image004.png轴正半轴围成的四边形封闭区域(含边界)中的点,使函数http://static.haoxue.com/tk/import/20150823152114/image238.pnghttp://static.haoxue.com/tk/import/20150823152114/image040.pnghttp://static.haoxue.com/tk/import/20150823152114/image124.png)的最大值为8,则http://static.haoxue.com/tk/import/20150823152114/image125.png的最小值(  )",

A.4

B.3

C.2

D.0