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设x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408231645398061215.png,若目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823164539837922.png的最大值为12,则 http://picflow.koolearn.com/upload/papers/20140823/20140823164539852590.png的最小值为

发布时间:2021-07-16

A.http://picflow.koolearn.com/upload/papers/20140823/20140823164539868419.png

B.http://picflow.koolearn.com/upload/papers/20140823/20140823164539899473.png

C.http://picflow.koolearn.com/upload/papers/20140823/20140823164539915362.png

D.4

试卷相关题目

  • 1给出平面区域G,如图所示,其中A(5,3),B(2,1),C(1,5)。若使目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823150449210550.gif取得最大值的最优解有无穷 http://picflow.koolearn.com/upload/papers/20140823/2014082315044922672.gif多个,则 http://picflow.koolearn.com/upload/papers/20140823/20140823150449241192.gif的值为(    )

    A.4

    B.2

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823150449304225.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823150449319224.gif http://picflow.koolearn.com/upload/papers/20140823/201408231504493356005.jpg

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  • 2已知 http://picflow.koolearn.com/upload/papers/20140823/20140823160045307701.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823160045494397.gif的最大值为 (    )

    A.-7http://picflow.koolearn.com/upload/papers/20140823/2014082316004549465.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823160045525246.gif

    C.-1

    D.-8

    开始考试点击查看答案
  • 3http://picflow.koolearn.com/upload/papers/20140823/20140823160259248497.gif,式中变量 http://picflow.koolearn.com/upload/papers/20140823/20140823160259451183.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823160259467192.gif满足 http://picflow.koolearn.com/upload/papers/20140823/20140823160259498616.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823160259716199.gif的最小值为(    )

    A.1

    B.-1

    C.3

    D.-3

    开始考试点击查看答案
  • 4曲线 http://picflow.koolearn.com/upload/papers/20140823/20140823161930505431.gif与直线 http://picflow.koolearn.com/upload/papers/20140823/20140823161930521441.gif所围成的平面图形的面积为:

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823161930583411.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823161930599391.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823161930614396.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823161930630280.gif

    开始考试点击查看答案
  • 5若实数 http://picflow.koolearn.com/upload/papers/20140823/20140823161133690329.gif满足 http://picflow.koolearn.com/upload/papers/20140823/20140823161133893764.gif 且 http://picflow.koolearn.com/upload/papers/20140823/20140823161133909399.gif的最小值为3,则实数 http://picflow.koolearn.com/upload/papers/20140823/20140823161133924197.gif的值为(   )

    A.1

    B.2

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823161133940236.gif

    D.3

    开始考试点击查看答案
  • 6已知实数x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823164044872956.png,则 http://picflow.koolearn.com/upload/papers/20140823/20140823164044887609.png的最大值为(   )

    A.24

    B.20

    C.16

    D.12

    开始考试点击查看答案
  • 7坐标平面上的点 http://picflow.koolearn.com/upload/papers/20140823/20140823162905460381.gif位于线性约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823162905475839.gif所表示的区域内(含边界),则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823162905491423.gif的最大值是

    A.15

    B.20

    C.18

    D.25

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  • 8设不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823162207894780.gif所表示的平面区域是 http://picflow.koolearn.com/upload/papers/20140823/20140823162207910227.gif,平面区 域 http://picflow.koolearn.com/upload/papers/20140823/20140823162207925234.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823162207910227.gif关于原点对称,对于 http://picflow.koolearn.com/upload/papers/20140823/20140823162207910227.gif中的任意点A与 http://picflow.koolearn.com/upload/papers/20140823/20140823162207925234.gif中的任意点B,|AB|的最小值等于

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823162208019224.gif

    B.2http://picflow.koolearn.com/upload/papers/20140823/20140823162208019224.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823162208066221.gif

    D.3http://picflow.koolearn.com/upload/papers/20140823/20140823162208019224.gif

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  • 9已知实数 x, y满足线性约束条件  x+y-4≥0 ,目标函数 z= y- ax( a∈R),若 z取2x-y-5≤0最大值时的唯一最优解是(1,3),则实数 a的取值范围是(  )

    A.(0,1)

    B.(-1,0)

    C.(1,+∞)

    D.(-∞,-1)

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  • 10若不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823150403003956.gif表示的平面区域是一个三角形,则 http://picflow.koolearn.com/upload/papers/20140823/20140823150403112192.gif的取值范围是(  )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823150403128414.gif

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823150403143310.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823150403159470.gif

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823150403143310.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823150403128414.gif

    开始考试点击查看答案
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