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若实数 http://picflow.koolearn.com/upload/papers/20140824/20140824044538122451.png满足 http://picflow.koolearn.com/upload/papers/20140824/201408240445381381390.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824044538216606.png的值域是(  )

发布时间:2021-07-19

A.http://picflow.koolearn.com/upload/papers/20140824/20140824044538216460.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824044538247419.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824044538263498.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824044538278466.png

试卷相关题目

  • 1已知实数 http://picflow.koolearn.com/upload/papers/20140824/20140824044815917403.png满足: http://picflow.koolearn.com/upload/papers/20140824/201408240448159481032.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824044815963640.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824044815979231.png的取值范围是(    )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824044816010476.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824044816026407.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824044816041461.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824044816073509.png

    开始考试点击查看答案
  • 2已知a>0,x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824044450792966.png若z=2x+y的最小值为1,则a=(  )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824044450823356.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824044450823374.png

    C.1

    D.2

    开始考试点击查看答案
  • 3http://picflow.koolearn.com/upload/papers/20140824/20140824045547179266.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045547194310.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240455472251090.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824045547241530.png的最大值是(    )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824045547257248.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824045547272373.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824045547288206.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824045547319291.png

    开始考试点击查看答案
  • 4设x、y满足 http://picflow.koolearn.com/upload/papers/20140824/201408240445385441399.png 则 http://picflow.koolearn.com/upload/papers/20140824/20140824044538575525.png(    )

    A.有最小值2,最大值3

    B.有最小值2,无最大值

    C.有最小值3,无最大值

    D.既无最小值,也无最大值

    开始考试点击查看答案
  • 5(2011?浙江)设实数x、y满足不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240510164121319.png,若x、y为整数,则3x+4y的最小值是(  )

    A.14

    B.16

    C.17

    D.19

    开始考试点击查看答案
  • 6若变量 http://picflow.koolearn.com/upload/papers/20140824/20140824043616802403.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240436168181300.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824043616833515.png的最大值为 http://picflow.koolearn.com/upload/papers/20140824/20140824043616849283.png,最小值为 http://picflow.koolearn.com/upload/papers/20140824/20140824043616849299.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824043616865390.png的值是(   )

    A.16

    B.24

    C.30

    D.48

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  • 7由不等式组 http://picflow.koolearn.com/upload/papers/20140824/20140824044453210957.png围成的三角形区域内有一个内切圆,向该区域内随机投一个点,该点落在圆内的概率是关于t的函数P(t),则(    )

    A.P′(t)>0

    B.P′(t)<0

    C.P′(t)=0

    D.P′(t)符号不确定

    开始考试点击查看答案
  • 8已知函数 http://picflow.koolearn.com/upload/papers/20140824/20140824050339594447.png的定义域为—2, http://picflow.koolearn.com/upload/papers/20140824/20140824050339610409.png,部分对应值如下表, http://picflow.koolearn.com/upload/papers/20140824/20140824050339641465.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824050339594447.png的导函数,函数 http://picflow.koolearn.com/upload/papers/20140824/20140824050339672578.png的图象如右图所示: http://picflow.koolearn.com/upload/papers/20140824/201408240503396881250.png     http://picflow.koolearn.com/upload/papers/20140824/201408240503397191336.png 若两正数 http://picflow.koolearn.com/upload/papers/20140824/20140824050339735396.png满足 http://picflow.koolearn.com/upload/papers/20140824/20140824050339750668.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824050339766538.png的取值范围是(     )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824050339797630.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824050339813593.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824050339813621.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824050339844543.png

    开始考试点击查看答案
  • 9在平面直角坐标系中,不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240455351351061.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045535151283.png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/20140824/20140824045535151283.png的值为(  )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824045535167468.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824045535198483.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824045535213271.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824045535229206.png http://picflow.koolearn.com/upload/papers/20140824/201408240455352454000.png

    开始考试点击查看答案
  • 10已知不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240450163331169.png 表示的平面区域的面积等于 http://picflow.koolearn.com/upload/papers/20140824/20140824045016349266.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824045016364283.png的值为(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824045016380223.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824045016396368.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824045016411291.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824045016427338.png

    开始考试点击查看答案
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