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在不等式2x+y-6<0表示的平面区域内的点是(   )

发布时间:2021-07-16

A.(0,1)

B.(5,0)

C.(0,7)

D.(2,3)

试卷相关题目

  • 1已知 http://picflow.koolearn.com/upload/papers/20140823/201408231500068811384.gif的最小值是5,则z的最大值是=(   )

    A.10

    B.12

    C.14

    D.15

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  • 2http://picflow.koolearn.com/upload/papers/20140823/20140823142305562329.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823142305593745.gif,若目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823142305609653.gif的最大值为 http://picflow.koolearn.com/upload/papers/20140823/20140823142305624138.gif,则 http://picflow.koolearn.com/upload/papers/20140823/20140823142305624417.gif的最小值为

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823142305640138.gif  

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823142305655337.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823142305687248.gif  D.http://picflow.koolearn.com/upload/papers/20140823/20140823142305702133.gif

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  • 3已知变量 http://picflow.koolearn.com/upload/papers/20140823/20140823140300085407.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408231403001161141.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823140300148551.png的最大值为(   ) http://picflow.koolearn.com/upload/papers/20140823/201408231403002574240.png

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823140300272253.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823140300288297.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823140300304212.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823140300319264.png

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  • 4已知点 M( x, y)在不等式组 http://picflow.koolearn.com/upload/papers/20140823/201408231350130321164.png所表示的平面区域内,则 http://picflow.koolearn.com/upload/papers/20140823/20140823135013048828.png的值域为

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823135013063466.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823135013079488.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823135013094681.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823135013235666.png

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  • 5设变量 http://picflow.koolearn.com/upload/papers/20140823/20140823141155993329.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823141156009593.gif,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823141156055404.gif的最小值为 (   )

    A.1

    B.2

    C.3

    D.4

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  • 6某加工厂用某原料由车间加工出 http://picflow.koolearn.com/upload/papers/20140823/20140823143336708200.gif产品,由乙车间加工出 http://picflow.koolearn.com/upload/papers/20140823/20140823143336723206.gif产品.甲车间加工一箱原料需耗费工时10小时可加工出7千克 http://picflow.koolearn.com/upload/papers/20140823/20140823143336708200.gif产品,每千克 http://picflow.koolearn.com/upload/papers/20140823/20140823143336708200.gif产品获利40元.乙车间加工一箱原料需耗费工时6小时可加工出4千克 http://picflow.koolearn.com/upload/papers/20140823/20140823143336723206.gif产品,每千克 http://picflow.koolearn.com/upload/papers/20140823/20140823143336723206.gif产品获利50元.甲、乙两车间每天功能完成至多70多箱原料的加工,每天甲、乙车间耗费工时总和不得超过480小时,甲、乙两车间每天获利最大的生产计划为 http://picflow.koolearn.com/upload/papers/20140823/20140823143336817398.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143336817401.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143336817401.gif

    A.甲车间加工原料10箱,乙车间加工原料60箱

    B.甲车间加工原料15箱,乙车间加工原料55箱

    C.甲车间加工原料18箱,乙车间加工原料50箱

    D.甲车间加工原料40箱,乙车间加工原料30箱 http://picflow.koolearn.com/upload/papers/20140823/201408231433368643351.gif

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  • 7若变量 http://picflow.koolearn.com/upload/papers/20140823/20140823143656684329.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823143656716795.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823143656731383.gif的最大值为

    A.4

    B.3

    C.2

    D.1

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  • 8下面四个点中,位于 http://picflow.koolearn.com/upload/papers/20140823/20140823142529113643.gif表示的平面区域内的点是(   )

    A.(0,2)

    B.(-2,0)

    C.(0,-2)

    D.(2,0)

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  • 9设变量 http://picflow.koolearn.com/upload/papers/20140823/20140823142248651329.gif满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/20140823142248667919.gif,则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823142248683423.gif的最大值 http://picflow.koolearn.com/upload/papers/20140823/20140823142248714327.gif与最小值 http://picflow.koolearn.com/upload/papers/20140823/20140823142248729211.gif的比 http://picflow.koolearn.com/upload/papers/20140823/20140823142248729369.gif=(   )

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    B.http://picflow.koolearn.com/upload/papers/20140823/20140823142248776313.gif

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823142248792214.gif

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  • 10已知不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823141102360821.gif所表示的平面区域的面积为4,则 http://picflow.koolearn.com/upload/papers/20140823/20140823141102360193.gif的值为

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    C.1http://picflow.koolearn.com/upload/papers/20140823/2014082314110240772.gifhttp://picflow.koolearn.com/upload/papers/20140823/20140823141102376195.gif

    D.3

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