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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(   )

发布时间:2021-07-16

A.7

B.5

C.4

D.3

试卷相关题目

  • 1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

    开始考试点击查看答案
  • 2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)

    开始考试点击查看答案
  • 3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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  • 4不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823143018041930.gif所表示的平面区域图形是

    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

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  • 5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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  • 6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

    开始考试点击查看答案
  • 7设符号 http://picflow.koolearn.com/upload/papers/20140823/20140823143749647241.gif表示不超过 http://picflow.koolearn.com/upload/papers/20140823/20140823143749662187.gif的最大整数,如 http://picflow.koolearn.com/upload/papers/20140823/20140823143749662337.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143749693349.gif , 又 http://picflow.koolearn.com/upload/papers/20140823/20140823143749662187.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143749787199.gif满足方程组 http://picflow.koolearn.com/upload/papers/20140823/20140823143749834820.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143749849247.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143749881369.gif 的取值范围(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823143749896282.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823143749990289.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823143750037290.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823143750052285.gif

    开始考试点击查看答案
  • 8已知线性约束条件为: http://picflow.koolearn.com/upload/papers/20140823/20140823145033908923.gif,则目标函数z=2x-y的最大值为(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823145033923239.gif

    B.-1

    C.2

    D.4

    开始考试点击查看答案
  • 9http://picflow.koolearn.com/upload/papers/20140823/20140823142549346434.gif,且 http://picflow.koolearn.com/upload/papers/20140823/20140823142549362317.gif时,则有序自然数对 http://picflow.koolearn.com/upload/papers/20140823/20140823142549378399.gif共有( )                                

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823142549393221.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823142549502219.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823142549518224.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823142549534212.gif

    开始考试点击查看答案
  • 10若实数 http://picflow.koolearn.com/upload/papers/20140823/20140823143408532187.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143408547193.gif满足不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823143408657973.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143408672342.gif的最大值为9,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823143408688220.gif

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823143408703202.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823143408719145.gif

    C.1

    D.2

    开始考试点击查看答案
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