题目 编号:87

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

答案及解析

答案

C

解析

点(3,1),(-4,6)在直线http://static.vko.cn/content/tk/import/20150823152109/image038.png的两侧 ,所以http://static.vko.cn/content/tk/import/20150823152109/image045.png,即http://static.vko.cn/content/tk/import/20150823152109/image046.png,所以http://static.vko.cn/content/tk/import/20150823152109/image043.png,故选:C.

举一反三

举一反三 根据好学网知识点分析,相似的试题还有:
  • 不等式2x+3y-6>0对应区域在直线2x+3y-6=0的(  )",

    A.左上
    B.左下
    C.右上
    D.右下
  • 设变量x,y满足约束条件http://static.haoxue.com/tk/import/20150823152118/image561.png则目标函数http://static.haoxue.com/tk/import/20150823152118/image562.png的取值范围是(  )",

    A.http://static.vko.cn/content/tk/import/20150823152118/image563.png
    B.http://static.vko.cn/content/tk/import/20150823152118/image564.png
    C.http://static.vko.cn/content/tk/import/20150823152118/image565.png
    D.http://static.vko.cn/content/tk/import/20150823152118/image566.png
  • 其中满足,若的最大值为6,则的最小值为(  )",

    A.-2
    B.-3
    C.-4
    D.-5