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若x,y满足线性约束条件: http://picflow.koolearn.com/upload/papers/20140823/20140823222013141870.png,则目标函数z=x+2y的取值范围是(  )

发布时间:2021-07-19

A.[3,6]

B.[2,4]

C.[2,6]

D.[3,5]

试卷相关题目

  • 1http://picflow.koolearn.com/upload/papers/20140823/20140823234008901403.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408232340089331268.png若目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823234008948861.png的值是最大值为12,则 http://picflow.koolearn.com/upload/papers/20140823/20140823234008964573.png的最小值为(        )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823234008995466.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823234009011411.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823234009026353.png

    D.4

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  • 2http://picflow.koolearn.com/upload/papers/20140823/20140823234416209444.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408232344162401239.png若目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823234416255995.png的最大值为 http://picflow.koolearn.com/upload/papers/20140823/20140823234416287354.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823234416302591.png的最小值为(   )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823234416333473.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823234416365419.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823234416380362.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823234416396259.png

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  • 3.要将两种大小不同的钢板截成

    B.C三种规格,每张钢板可同时截得三种规格的小钢板块数如下表:A规格B规格C规格第一种钢板211第二种钢板123 今需A.B.C三种规格的成品各15、18、27块,所需两种规格的钢板的张数分别为m、n(m、n为整数),则m+n的最小值为 ( ) A.10 B.11

    C.12

    D.13

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  • 4正数 http://picflow.koolearn.com/upload/papers/20140823/20140823224533910266.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823224533925310.png满足 http://picflow.koolearn.com/upload/papers/20140823/201408232245339561012.png,则 http://picflow.koolearn.com/upload/papers/20140823/20140823224533972724.png的最小值为(   )

    A.1

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823224533988519.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823224534003362.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823224534019415.png

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  • 5已知约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408232228571931382.png若目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823222857271757.png恰好在点(2,2)处取得最大值,则 http://picflow.koolearn.com/upload/papers/20140823/20140823222857442289.png 的取值范围为( )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823222857458550.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823222857598476.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823222857629459.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823222857661563.png

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  • 6已知点 http://picflow.koolearn.com/upload/papers/20140823/20140823225009016289.png在直线 http://picflow.koolearn.com/upload/papers/20140823/20140823225009032592.png上,点 http://picflow.koolearn.com/upload/papers/20140823/20140823225009203333.png在直线 http://picflow.koolearn.com/upload/papers/20140823/20140823225009219633.png上, http://picflow.koolearn.com/upload/papers/20140823/20140823225009234399.png中点为 http://picflow.koolearn.com/upload/papers/20140823/20140823225009266718.png,且 http://picflow.koolearn.com/upload/papers/20140823/20140823225009359594.png,则 http://picflow.koolearn.com/upload/papers/20140823/20140823225009390479.png的取值范围为(  ).

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823225009422762.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823225009437579.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823225009453650.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823225009468668.png

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  • 7http://picflow.koolearn.com/upload/papers/20140823/20140823230626904286.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823230626919313.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408232306269351102.png,则 http://picflow.koolearn.com/upload/papers/20140823/20140823230626966533.png的最大值为(   )

    A.9

    B.8

    C.7

    D.6

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  • 8设变量 http://picflow.koolearn.com/upload/papers/20140823/20140823224513552392.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140823/201408232245135671096.png则目标函数 http://picflow.koolearn.com/upload/papers/20140823/20140823224513583529.png的取值范围是(    )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823224513614532.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823224513708486.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823224513723398.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823224513739529.png

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  • 9已知点 P ( x, y)的坐标满足 http://picflow.koolearn.com/upload/papers/20140823/201408232303385331123.png,则( x-1) 2+ y 2的取值范围是(   )

    A.[http://picflow.koolearn.com/upload/papers/20140823/20140823230338548336.png,9)

    B.[http://picflow.koolearn.com/upload/papers/20140823/20140823230338548336.png,9]

    C.[1,9)

    D.[http://picflow.koolearn.com/upload/papers/20140823/20140823230338548336.png,3)

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  • 10已知点 http://picflow.koolearn.com/upload/papers/20140823/20140823223044458443.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823223044490505.png在直线 http://picflow.koolearn.com/upload/papers/20140823/20140823223044505674.png的两侧,则 http://picflow.koolearn.com/upload/papers/20140823/20140823223044568283.png的取值范围是 http://picflow.koolearn.com/upload/papers/20140823/20140823223044583169.png(    )

    A.http://picflow.koolearn.com/upload/papers/20140823/20140823223044599363.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823223044614478.png

    B.http://picflow.koolearn.com/upload/papers/20140823/20140823223044646370.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823223044677446.png

    C.http://picflow.koolearn.com/upload/papers/20140823/20140823223044880550.png

    D.http://picflow.koolearn.com/upload/papers/20140823/20140823223044895564.png

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