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设变量x、y满足 http://picflow.koolearn.com/upload/papers/20140824/201408240456342441131.png则目标函数z=2x+y的最小值为(    )

发布时间:2021-07-19

A.http://picflow.koolearn.com/upload/papers/20140824/20140824045634275388.png

B.2

C.4

D.6

试卷相关题目

  • 1设不等式组 http://picflow.koolearn.com/upload/papers/20140824/20140824045431394983.png,表示的平面区域为D,在区域D内随机取一个点,则此点到坐标原点的距离大于2的概率是(  )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824045431409297.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824045431409399.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824045431425306.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824045431440407.png

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  • 2已知 http://picflow.koolearn.com/upload/papers/20140824/20140824043216187400.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240432162031008.png,则目标函数 http://picflow.koolearn.com/upload/papers/20140824/20140824043216219591.png的最大值(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824043216234291.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824043216250287.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824043216265248.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824043216281259.png

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  • 3若函数 http://picflow.koolearn.com/upload/papers/20140824/20140824044452196477.png图像上存在点(x,y)满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240444522741128.png,则实数m的最大值为(    )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824044452289338.png

    B.1

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824044452305388.png

    D.2

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  • 4已知函数 http://picflow.koolearn.com/upload/papers/20140824/20140824050505847738.png在x 1处取得极大值,在x 2处取得极小值,且x 1∈(-1,1),x 2∈(1,2),则2a+b的取值范围是(   )

    A.(-7,2)

    B.(-7,3)

    C.(2,3)

    D.(-1,2)

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  • 5某工厂分别生产甲、乙两种产品1箱时所需要的煤、电以及获得的纯利润如下表所示.煤(吨)电(千度)纯利润(万元)http://picflow.koolearn.com/upload/papers/20140824/20140824045707144206.png箱甲产品http://picflow.koolearn.com/upload/papers/20140824/20140824045707176287.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045707144206.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045707191291.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045707144206.png箱乙产品http://picflow.koolearn.com/upload/papers/20140824/20140824045707144206.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045707144206.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045707144206.png  若生产甲、乙两种产品可使用的煤不超过 http://picflow.koolearn.com/upload/papers/20140824/20140824045707254383.png吨,电不超过 http://picflow.koolearn.com/upload/papers/20140824/20140824045707269350.png千度,则可获得的最大纯利润和是(     )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824045707269350.png万元

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824045707300366.png万元

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824045707316345.png万元

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824045707332318.png万元

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  • 6若变量x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824050051020956.png,则z=2x+y的最大值和最小值分别为(  )

    A.4和3

    B.4和2

    C.3和2

    D.2和0

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  • 7已知变量x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824050238364951.png,则z=x+2y的最小值为

    A.3

    B.1

    C.-5

    D.-6

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  • 8已知变量x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824051133804959.png,则目标函数z="2x" +y的最大值是(  )

    A.-4

    B.1

    C.2

    D.4

    开始考试点击查看答案
  • 9若实数 http://picflow.koolearn.com/upload/papers/20140824/20140824051632638403.png满足条件 http://picflow.koolearn.com/upload/papers/20140824/20140824051632654866.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824051632669549.png的最大值为(   )

    A.9

    B.11

    C.12

    D.16

    开始考试点击查看答案
  • 10已知点 http://picflow.koolearn.com/upload/papers/20140824/20140824043648767651.png是不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240436487981102.png所表示的平面区域内任意一点,则点M到直线 http://picflow.koolearn.com/upload/papers/20140824/20140824043648829465.png距离的最大值为(    )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824043648923344.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824043648938438.png

    C.2

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824043648954322.png

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