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不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823143018041930.gif所表示的平面区域图形是

发布时间:2021-07-16

A.第一象限内的三角形

B.四边形

C.第三象限内的三角形

D.以上都不对

试卷相关题目

  • 1已知 http://picflow.koolearn.com/upload/papers/20140823/20140823141813046200.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823141813061350.gif平面内的一个区域.甲:点 http://picflow.koolearn.com/upload/papers/20140823/201408231418130921409.gif; 乙:点 http://picflow.koolearn.com/upload/papers/20140823/20140823141813108442.gif.如果甲是乙的必要条件,那么区域 http://picflow.koolearn.com/upload/papers/20140823/20140823141813046200.gif的面积

    A.最小值为2

    B.无最大值

    C.最大值为2

    D.最大值为1

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  • 2若不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823134710886876.gif表示的平面区域是一个三角形,则实数 s的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823134710902422.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823134710917287.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823134710948231.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823134710964363.gif

    开始考试点击查看答案
  • 3定义 http://picflow.koolearn.com/upload/papers/20140823/201408231404512982198.png,设 http://picflow.koolearn.com/upload/papers/20140823/201408231404513131032.png的取值范围是(   )

    A.[-7,10]

    B.[—6,10]

    C.[-6,8]

    D.[—7,8]

    开始考试点击查看答案
  • 4设变量 http://picflow.koolearn.com/upload/papers/20140823/20140823144015304325.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823144015366745.gif,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823144015398381.gif的最小值为

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823144015413210.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823144015429211.gif 

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823144015444199.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823144015460202.gif

    开始考试点击查看答案
  • 5在平面直角坐标系中,若不等式组 http://picflow.koolearn.com/upload/papers/20140823/201408231414482801159.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823141448295287.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/20140823/20140823141448295287.png的值等于(    )

    A.-5

    B.1

    C.2

    D.3

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  • 6设变量 http://picflow.koolearn.com/upload/papers/20140823/20140823143612115230.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823143612146742.gif,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823143612209129.gif=2 http://picflow.koolearn.com/upload/papers/20140823/20140823143612271187.gif+4 http://picflow.koolearn.com/upload/papers/20140823/20140823143612287193.gif的最大值为(  )

    A.10

    B.12

    C.13

    D.14

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  • 7已知 http://picflow.koolearn.com/upload/papers/20140823/20140823143420435105.gifABCD的三个顶点为A(-1,2),B(3,4),C(4,-2),点(x,y)在 http://picflow.koolearn.com/upload/papers/20140823/20140823143420435105.gifABCD的内部,则z=2x-5y的取值范围是

    A.(-14,16)

    B.(-14,20)

    C.(-12,18)

    D.(-12,20)

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  • 8已知点 http://picflow.koolearn.com/upload/papers/20140823/20140823135028570569.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408231350285851015.png,则 http://picflow.koolearn.com/upload/papers/20140823/20140823135028601532.png的最大值(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823135028601287.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823135028632298.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823135028632232.png

    D.2

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  • 9已知实数 http://picflow.koolearn.com/upload/papers/20140823/20140823134640622232.gif满足 http://picflow.koolearn.com/upload/papers/20140823/20140823134640638790.gif如果目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823134640653358.gif的最小值为 http://picflow.koolearn.com/upload/papers/20140823/20140823134640684145.gif,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823134640700204.gif等于(   )

    A.7

    B.5

    C.4

    D.3

    开始考试点击查看答案
  • 10不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823145228053667.gif表示的区域为 D,点 P (0,-2), Q (0,0),则(   )

    A.Phttp://picflow.koolearn.com/upload/papers/20140823/20140823145228069195.gifD,且Q http://picflow.koolearn.com/upload/papers/20140823/20140823145228069195.gifD

    B.Phttp://picflow.koolearn.com/upload/papers/20140823/20140823145228069195.gifD,且Q ∈D

    C.P∈D,且Q http://picflow.koolearn.com/upload/papers/20140823/20140823145228069195.gifD

    D.P∈D,且Q ∈D

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