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设实数x,y满足 http://picflow.koolearn.com/upload/papers/20140824/20140824035342485860.png则点(x,y)在圆面x 2+y 2≤ http://picflow.koolearn.com/upload/papers/20140824/20140824035342500338.png内部的概率为(  )

发布时间:2021-07-19

A.http://picflow.koolearn.com/upload/papers/20140824/20140824035342500423.png

B.http://picflow.koolearn.com/upload/papers/20140824/20140824035342516396.png

C.http://picflow.koolearn.com/upload/papers/20140824/20140824035342547474.png

D.http://picflow.koolearn.com/upload/papers/20140824/20140824035342547421.png

试卷相关题目

  • 1某运输公司有12名驾驶员和19名工人,有8辆载重为10吨的甲型卡车和7辆载重为6吨的乙型卡车.某天需运往A地至少72吨的货物,派用的每辆车需满载且只运送一次,派用的每辆甲型卡车需配2名工人,运送一次可得利润450元;派用的每辆乙型卡车需配1名工人,运送一次可得利润350元.该公司合理计划当天派用两类卡车的车辆数,可得最大利润z=(  )

    A.4650元

    B.4700元

    C.4900元

    D.5000元

    开始考试点击查看答案
  • 2设 x, y满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240347591911059.png则 z=2 x-3 y的最小值是(  )

    A.-7

    B.-6

    C.-5

    D.-3

    开始考试点击查看答案
  • 3当变量 http://picflow.koolearn.com/upload/papers/20140824/20140824041926061403.png满足约束条件 http://picflow.koolearn.com/upload/papers/20140824/201408240419261541333.png的最大值为8,则实数 http://picflow.koolearn.com/upload/papers/20140824/20140824041926170337.png的值是(   )

    A.-4

    B.-3

    C.-2

    D.-1

    开始考试点击查看答案
  • 4已知点 http://picflow.koolearn.com/upload/papers/20140824/20140824041735145802.png,直线 http://picflow.koolearn.com/upload/papers/20140824/20140824041735160955.png与线段 http://picflow.koolearn.com/upload/papers/20140824/20140824041735176392.png相交,则 http://picflow.koolearn.com/upload/papers/20140824/20140824041735191609.png最小值为(   )

    A.http://picflow.koolearn.com/upload/papers/20140824/20140824041735191457.png

    B.http://picflow.koolearn.com/upload/papers/20140824/20140824041735207370.png

    C.http://picflow.koolearn.com/upload/papers/20140824/20140824041735223488.png

    D.http://picflow.koolearn.com/upload/papers/20140824/20140824041735238346.png

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  • 5点(x,y)满足 http://picflow.koolearn.com/upload/papers/20140824/201408240356224941026.png若目标函数z=x-2y的最大值为1,则实数a的值是(    )

    A.1

    B.-1

    C.-3

    D.3

    开始考试点击查看答案
  • 6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
  • 7http://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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  • 8(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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  • 9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

    开始考试点击查看答案
  • 10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]

    开始考试点击查看答案
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