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若实数x,y满足 http://picflow.koolearn.com/upload/papers/20140823/20140823161850398753.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823161850413512.gif的取值范围是(   )

发布时间:2021-07-16

A.http://picflow.koolearn.com/upload/papers/20140823/20140823161850429315.gif

B.http://picflow.koolearn.com/upload/papers/20140823/20140823161850444508.gif

C.[3,11]

D.http://picflow.koolearn.com/upload/papers/20140823/20140823161850476302.gif

试卷相关题目

  • 1已知平面区域 http://picflow.koolearn.com/upload/papers/20140823/201408231632038311082.gif, http://picflow.koolearn.com/upload/papers/20140823/20140823163204065960.gif,向区域 http://picflow.koolearn.com/upload/papers/20140823/20140823163204267208.gif内随机投一点 http://picflow.koolearn.com/upload/papers/20140823/20140823163204283197.gif,点 http://picflow.koolearn.com/upload/papers/20140823/20140823163204283197.gif落在区域 http://picflow.koolearn.com/upload/papers/20140823/20140823163204330319.gif内的概率为( )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823163204345210.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823163204377216.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823163204392213.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823163204408219.gif

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  • 2http://picflow.koolearn.com/upload/papers/20140823/20140823163016128266.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823163016144310.png满足条件 http://picflow.koolearn.com/upload/papers/20140823/20140823163016159515.png时,变量 http://picflow.koolearn.com/upload/papers/20140823/20140823163016159633.png的取值范围是(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823163016175537.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823163016190874.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823163016206444.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823163016237745.png

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  • 3如图,设 D是图中边长分别为2和4的矩形区域, E是 D内位于函数 y= x 2图象下方的区域(阴影部分),向 D内随机抛掷30个点,则落在 E内的点的个数约为(  )

    A.15

    B.20

    C.5

    D.10http://picflow.koolearn.com/upload/papers/20140823/201408231619281032358.jpg

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  • 4设变量 http://picflow.koolearn.com/upload/papers/20140823/20140823162153448187.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823162153464193.gif满足约束条件  http://picflow.koolearn.com/upload/papers/20140823/20140823162153480706.gif, 则 http://picflow.koolearn.com/upload/papers/20140823/20140823162153495424.gif的最大值为 (    )

    A.1

    B.2

    C.4

    D.6

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  • 5已知三角形ABC的顶点坐标A(2,4),B(-1,2),C(1,0),点 http://picflow.koolearn.com/upload/papers/20140823/20140823161608875410.gif在三角形内部及边界上运动,则 http://picflow.koolearn.com/upload/papers/20140823/20140823161608875357.gif的最大值和最小值分别是  (      )

    A.3,1

    B.-1,-3

    C.1,-3

    D.3,-1

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  • 6http://picflow.koolearn.com/upload/papers/20140823/20140823160526263329.gif满足约 http://picflow.koolearn.com/upload/papers/20140823/2014082316052627972.gif束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823160526294920.gif,若目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823160526341661.gif的最大值为12,则 http://picflow.koolearn.com/upload/papers/20140823/20140823160526372411.gif的最小值为(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823160526513228.gif

    B.image.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823160526575240.gif

    D.4

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