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设m>1,在约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824045804552967.png下,目标函数z=x+my的最大值小于2,则m的取值范围为(  )

发布时间:2021-07-19

A.(1,1+http://picflow.koolearn.com/upload/papers/20140824/20140824045804584344.png)

B.(1+http://picflow.koolearn.com/upload/papers/20140824/20140824045804584344.png,+∞)

C.(1,3)

D.(3,+∞)

试卷相关题目

  • 1变量x,y满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240505312901109.png,则目标函数z=3x-y的取值范围是(  )

    A.[-http://picflow.koolearn.com/upload/papers/20140824/20140824050531290388.png,6]

    B.[-http://picflow.koolearn.com/upload/papers/20140824/20140824050531290388.png,-1]

    C.[-1,6]

    D.[-6,http://picflow.koolearn.com/upload/papers/20140824/20140824050531290388.png]

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  • 2若曲线 http://picflow.koolearn.com/upload/papers/20140824/20140824051546727466.png上存在点 http://picflow.koolearn.com/upload/papers/20140824/20140824051546743533.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240515467581110.png,则实数 http://picflow.koolearn.com/upload/papers/20140824/20140824051546789337.png的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824051546805397.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824051546821509.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824051546821566.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824051546836526.png

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  • 3(5分)(2011?广东)已知平面直角坐标系xOy上的区域D由不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240519058771400.png给定.若M(x,y)为D上的动点,点A的坐标为 http://picflow.koolearn.com/upload/papers/20140824/20140824051905986600.png,则z= http://picflow.koolearn.com/upload/papers/20140824/20140824051906002321.png? http://picflow.koolearn.com/upload/papers/20140824/20140824051906017328.png的最大值为(       )

    A.3

    B.4

    C.3http://picflow.koolearn.com/upload/papers/20140824/20140824051906033416.png

    D.4http://picflow.koolearn.com/upload/papers/20140824/20140824051906033416.png

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  • 4http://picflow.koolearn.com/upload/papers/20140824/20140824043105628266.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824043105644310.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824043105675943.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824043105691544.png的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824043105706401.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824043105722425.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824043105769422.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824043105769438.png

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  • 5已知正三角形 ABC的顶点 A(1,1), B(1,3),顶点 C在第一象限,若点( x, y)在△ ABC内部,则 z=- x+ y的取值范围是

    A.(1-http://picflow.koolearn.com/upload/papers/20140824/20140824042618775344.png,2)

    B.(0,2)

    C.(http://picflow.koolearn.com/upload/papers/20140824/20140824042618775344.png-1,2)

    D.(0,1+http://picflow.koolearn.com/upload/papers/20140824/20140824042618775344.png)

    开始考试点击查看答案
  • 6已知实数 http://picflow.koolearn.com/upload/papers/20140824/20140824050747167403.png满足 http://picflow.koolearn.com/upload/papers/20140824/20140824050747198811.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824050747213686.png的取值范围为(     )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824050747229525.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824050747260829.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824050747276564.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824050747291841.png

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  • 7已知 http://picflow.koolearn.com/upload/papers/20140824/20140824045933410556.png是不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240459334411047.png表示的平面区域内的一点, http://picflow.koolearn.com/upload/papers/20140824/20140824045933473524.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824045933488296.png为坐标原点,则 http://picflow.koolearn.com/upload/papers/20140824/20140824045933504510.png的最大值(   )

    A.2

    B.3

    C.5

    D.6

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  • 8(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

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  • 9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

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  • 10http://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

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