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已知点 http://picflow.koolearn.com/upload/papers/20140824/20140824011739707499.png满足 http://picflow.koolearn.com/upload/papers/20140824/201408240117397231008.png,目标函数 http://picflow.koolearn.com/upload/papers/20140824/20140824011739738598.png仅在点(1,0)处取得最小值,则 http://picflow.koolearn.com/upload/papers/20140824/20140824011739754283.png的范围为(   )

发布时间:2021-07-20

A.http://picflow.koolearn.com/upload/papers/20140824/20140824011739863485.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824011739879508.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824011739894479.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824011739988503.png

试卷相关题目

  • 1已知 http://picflow.koolearn.com/upload/papers/20140824/20140824005816039538.png,且满足 http://picflow.koolearn.com/upload/papers/20140824/201408240058160541086.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824005816070616.png的最小值等于(    )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824005816070432.png

    B.-4

    C.0D.-1

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  • 2变量x,y,满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240034274191109.png,则目标函数z=3|x|+|y-3|的取值范围是

    A.[http://picflow.koolearn.com/upload/papers/20140824/20140824003427419388.png,9]

    B.[-http://picflow.koolearn.com/upload/papers/20140824/20140824003427419388.png,6]

    C.[-2,3] 

    D.[1,6]

    开始考试点击查看答案
  • 3设不等式组 http://picflow.koolearn.com/upload/papers/20140824/201408240045194541310.png  表示的平面区域为D,若指数函数y= http://picflow.koolearn.com/upload/papers/20140824/20140824004519469332.png的图像上存在区域D上的点,则a 的取值范围是 (   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824004519485428.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824004519516420.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824004519532449.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824004519547531.png

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  • 4若实数x、y满足 http://picflow.koolearn.com/upload/papers/20140824/20140824004742381913.png则S=2x+y-1的最大值为

    A.6

    B.4

    C.3

    D.2

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  • 5把一根长度为7的铁丝截成任意长的3段,则能构成三角形的概率为

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824005548572338.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824005548587385.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824005548603346.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824005548618303.png

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  • 6http://picflow.koolearn.com/upload/papers/20140824/20140824003420852405.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/20140824003420867995.png,目标函数 http://picflow.koolearn.com/upload/papers/20140824/20140824003420883610.png仅在点 http://picflow.koolearn.com/upload/papers/20140824/20140824003420899379.png处取得小值,则 k的取值范围为

    A.(-1,2)

    B.(-4,2)

    C.(-4,0]

    D.(-2,4)

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  • 7若A为不等式组 http://picflow.koolearn.com/upload/papers/20140824/20140824011844120946.png所示的平面区域,则当a从-2连续变化到1时,动直线x+ y =a扫过A中的那部分区域面积为(   )

    A.2

    B.1

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824011844135385.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824011844151354.png

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  • 8设平面区域D是由双曲线 http://picflow.koolearn.com/upload/papers/20140824/20140824005812076577.png的两条渐近线和直线 http://picflow.koolearn.com/upload/papers/20140824/20140824005812092593.png所围成三角形的边界及内部.当 http://picflow.koolearn.com/upload/papers/20140824/20140824005812108556.png时, http://picflow.koolearn.com/upload/papers/20140824/20140824005812123540.png的最大值为(    ).

    A.12

    B.10

    C.8

    D.6

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  • 9定义: http://picflow.koolearn.com/upload/papers/20140824/201408240055416451178.png.在区域 http://picflow.koolearn.com/upload/papers/20140824/20140824005541661856.png内任取一点 http://picflow.koolearn.com/upload/papers/20140824/20140824005541661568.png,则 http://picflow.koolearn.com/upload/papers/20140824/20140824005541676266.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824005541692310.png 满足 http://picflow.koolearn.com/upload/papers/20140824/201408240055417081114.png的概率为

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824005541723372.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824005541739370.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824005541754327.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824005541770409.png

    开始考试点击查看答案
  • 10设实数 http://picflow.koolearn.com/upload/papers/20140824/20140824004437958266.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824004437989310.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240044380051205.png,若目标函数 http://picflow.koolearn.com/upload/papers/20140824/20140824004438020608.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824004438036398.pnghttp://picflow.koolearn.com/upload/papers/20140824/20140824004438051414.png)的最大值为12,则 http://picflow.koolearn.com/upload/papers/20140824/20140824004438067370.png的取值范围是(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824004438083535.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824004438192568.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824004438207613.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824004438223542.png

    开始考试点击查看答案
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