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设实数 http://picflow.koolearn.com/upload/papers/20140823/20140823213956229403.png满足 http://picflow.koolearn.com/upload/papers/20140823/201408232139562441170.png  ,则 http://picflow.koolearn.com/upload/papers/20140823/20140823213956275603.png的最大值( )

发布时间:2021-07-19

A.http://picflow.koolearn.com/upload/papers/20140823/20140823213956369324.png

B.2

C.3

D.http://picflow.koolearn.com/upload/papers/20140823/20140823213956385375.png

试卷相关题目

  • 1若实数x,y满足 http://picflow.koolearn.com/upload/papers/20140823/201408232117452191261.jpg,则 http://picflow.koolearn.com/upload/papers/20140823/20140823211745234817.jpg的最小值为      

    A.O

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823211745266469.jpg

    C.2

    D.4

    开始考试点击查看答案
  • 2已知点集 http://picflow.koolearn.com/upload/papers/20140823/201408232108539131329.pnghttp://picflow.koolearn.com/upload/papers/20140823/201408232108539291407.png,点集 http://picflow.koolearn.com/upload/papers/20140823/20140823210853944298.png所表示的平面区域与点集 http://picflow.koolearn.com/upload/papers/20140823/20140823210853960292.png所表示的平面区域的边界的交点为 http://picflow.koolearn.com/upload/papers/20140823/20140823210853975550.png.若点 http://picflow.koolearn.com/upload/papers/20140823/20140823210853991600.png在点集 http://picflow.koolearn.com/upload/papers/20140823/20140823210853944298.png所表示的平面区域内(不在边界上),则△ http://picflow.koolearn.com/upload/papers/20140823/20140823210854038565.png的面积的最大值是

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823210854053205.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823210854069291.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823210854085379.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823210854100248.png

    开始考试点击查看答案
  • 3某加工厂用某原料由甲车间加工出A产品,由乙车间加工出B产品.甲车间加工一箱原料需耗费工时10小时可加工出7千克A产品,每千克A产品获利40元.乙车间加工一箱原料需耗费工时6小时可加工出4千克B产品,每千克B产品获利50元.甲、乙两车间每天共能完成至多70箱原料的加工,每天甲、乙车间耗费工时总和不得超过480小时,甲、乙两车间每天总获利最大的生产计划为 (      )

    A.甲车间加工原料10箱,乙车间加工原料60箱

    B.甲车间加工原料15箱,乙车间加工原料55箱

    C.甲车间加工原料18箱,乙车间加工原料50箱

    D.甲车间加工原料40箱,乙车间加工原料30箱

    开始考试点击查看答案
  • 4在平面直角坐标系中,若不等式组 http://picflow.koolearn.com/upload/papers/20140823/201408232047303581157.png( http://picflow.koolearn.com/upload/papers/20140823/20140823204730374287.png为常数)所表示的平面区域的面积等于2,则 http://picflow.koolearn.com/upload/papers/20140823/20140823204730374287.png的值为(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823204730561276.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823204730561212.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823204730592297.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823204730592294.png

    开始考试点击查看答案
  • 5若不等式组 http://picflow.koolearn.com/upload/papers/20140823/201408232052003641956.jpg表示的平面区三角形,则实数K的取值范围是

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823205200379983.jpg

    B.http://picflow.koolearn.com/upload/papers/20140823/201408232052003951167.jpg

    C.http://picflow.koolearn.com/upload/papers/20140823/201408232052004101416.jpg

    D.http://picflow.koolearn.com/upload/papers/20140823/201408232052004421561.jpg

    开始考试点击查看答案
  • 6已知直线 http://picflow.koolearn.com/upload/papers/20140823/20140823201043953650.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823201043968396.png是非零常数)与圆 http://picflow.koolearn.com/upload/papers/20140823/20140823201043984548.png有公共点,且公共点的横坐标和纵坐标均为整数,那么这样的直线共有(   )

    A.4条

    B.6条

    C.0条

    D.10条

    开始考试点击查看答案
  • 7http://picflow.koolearn.com/upload/papers/20140823/20140823202614198874.png展开式中,中间项的系数为70.若实数 http://picflow.koolearn.com/upload/papers/20140823/20140823202614214435.png满足 http://picflow.koolearn.com/upload/papers/20140823/201408232026142451152.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823202614260544.png的最小值是(   )

    A.-1

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823202614354343.png

    C.5

    D.1

    开始考试点击查看答案
  • 8已知关于x、y的不等式组 http://picflow.koolearn.com/upload/papers/20140823/201408232031366821220.png,所表示的平面区域的面积为16,则k的值为

    A.-1

    B.2

    C.1

    D.3

    开始考试点击查看答案
  • 9已知点 http://picflow.koolearn.com/upload/papers/20140823/20140823204659813629.png的坐标满足 http://picflow.koolearn.com/upload/papers/20140823/201408232046598291125.png  http://picflow.koolearn.com/upload/papers/20140823/20140823204659845298.png为坐标原点, 则 http://picflow.koolearn.com/upload/papers/20140823/20140823204659860402.png的最小值为(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823204659891427.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823204659923506.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823204659954325.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823204659969393.png

    开始考试点击查看答案
  • 10已知 http://picflow.koolearn.com/upload/papers/20140823/20140823205151518403.png满足 http://picflow.koolearn.com/upload/papers/20140823/201408232051515341072.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823205151550540.png的最小值为(   )

    A.2

    B.6.5

    C.4

    D.8

    开始考试点击查看答案
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