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如果实数x、y满足条件 http://picflow.koolearn.com/upload/papers/20140823/20140823150643059923.gif,若 http://picflow.koolearn.com/upload/papers/20140823/20140823150643075374.gif有最大值时的 http://picflow.koolearn.com/upload/papers/20140823/20140823150643090232.gif满足 http://picflow.koolearn.com/upload/papers/20140823/20140823150643122479.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823150643215192.gif>0, http://picflow.koolearn.com/upload/papers/20140823/20140823150643231197.gif>0),则 http://picflow.koolearn.com/upload/papers/20140823/20140823150643246414.gif的最小值为(   )

发布时间:2021-07-16

A.4

B.http://picflow.koolearn.com/upload/papers/20140823/20140823150643309262.gif

C.http://picflow.koolearn.com/upload/papers/20140823/20140823150643324248.gif

D.5

试卷相关题目

  • 1若变量 http://picflow.koolearn.com/upload/papers/20140823/20140823154333099329.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823154333131773.gif,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823154333162383.gif的最大值为(   )

    A.—3

    B.3

    C.—1

    D.1

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  • 2若实数 http://picflow.koolearn.com/upload/papers/20140823/20140823155412186187.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823155412201193.gif满足不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823155412264973.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823155412295342.gif的最大值为9,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823155412311220.gif( )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823155412326202.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823155412357145.gif

    C.1

    D.2

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  • 3在平面直角坐标系中,不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823162807989778.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823162808005192.gif为常数)表示的平面区域的面积是9,那么实数 http://picflow.koolearn.com/upload/papers/20140823/20140823162808005192.gif的值为(     )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823162808036299.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823162808067307.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823162808083145.gif

    D.1

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  • 4不等式组 http://picflow.koolearn.com/upload/papers/20140823/201408231647552761641.png表示的平面区域为D,区域D关于直线 http://picflow.koolearn.com/upload/papers/20140823/20140823164755292584.png的对称区域为E,则区域D和E中距离最近的两点间距离为  (   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823164755307561.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823164755323538.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823164755339553.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823164755354714.png

    开始考试点击查看答案
  • 5已知不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823163418209726.gif表示平面区域D,现在往抛物线 http://picflow.koolearn.com/upload/papers/20140823/20140823163418225449.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823163418240187.gif轴围成的封闭区域内随机地抛掷一粒小颗粒,则该颗粒落到区域D中的概率( )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823163418256235.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823163418272254.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823163418303217.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823163418318234.gif

    开始考试点击查看答案
  • 6完成一项装修工程,木工和瓦工的比例为2∶3,请木工需付工资每人50元,请瓦工需付工资每人40元,现有工资预算2 000元,设木工x人,瓦工y人,请工人数的约束条件是(    )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823155934202683.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823155934217884.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823155934233975.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823155934248776.gif

    开始考试点击查看答案
  • 7设变量 x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823151315493709.gif,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823151315509422.gif的最大值为 (    )

    A.10

    B.12

    C.13

    D.14

    开始考试点击查看答案
  • 8若不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823161944280863.gif表示的平面区域面积等于2,则 http://picflow.koolearn.com/upload/papers/20140823/20140823161944296192.gif=(    )

    A.3

    B.4

    C.5

    D.6

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  • 9已知点 http://picflow.koolearn.com/upload/papers/20140823/20140823162755962562.gif,设 http://picflow.koolearn.com/upload/papers/20140823/20140823162755977397.gif是区域 http://picflow.koolearn.com/upload/papers/20140823/201408231627559931221.gif边界上的点,则下列式子恒成立的是(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823162756009544.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823162756024547.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823162756133540.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823162756149526.gif

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  • 10设变量x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823164138785978.png,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823164138801609.png的最大值为(   )

    A.10

    B.12

    C.13

    D.14

    开始考试点击查看答案
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