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不等式组http://picflow.koolearn.com/upload/papers/g02/20110812/201108121556279681872.gif所表示的平面区域的图形是

发布时间:2021-07-16

A.四边形

B.第二象限内的三角形

C.第一象限内的三角形

D.五边形

试卷相关题目

  • 1已知点A(3,1)和点B(4,6)分别在直线3x-2y+a=0两侧,则a的取值范围是

    A.a<-7或a>0

    B.a=7或a=0

    C.-7<a<0

    D.0<a<7

    开始考试点击查看答案
  • 2不等式2x+3y-6≤0表示的平面区域是

    A.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181710274121483.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181710274121347.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181710274591408.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181710274591533.gif

    开始考试点击查看答案
  • 3已知实数x,y满足http://picflow.koolearn.com/upload/papers/g02/20110521/201105211559387561581.gif(x∈Z,y∈Z),每一对整数(x,y)对应平面上一个点,经过其中任意两点作直线,则不同直线的条数是

    A.14

    B.19

    C.36

    D.72

    开始考试点击查看答案
  • 4设不等式组http://picflow.koolearn.com/upload/papers/g02/20110713/201107131343395461544.gif所表示的区域为A,现在区域A中任意丢进一个粒子,则该粒子落在直线y=http://picflow.koolearn.com/upload/papers/g02/20110713/20110713134339546879.gifx下方的概率为

    A.http://picflow.koolearn.com/upload/papers/g02/20110713/20110713134339562873.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110713/20110713134339562880.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110713/20110713134339578879.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110713/20110713134339578882.gif

    开始考试点击查看答案
  • 5已知平行四边形ABCD的三个顶点为A(-1,2),B(3,4),C(4,-2),点(x,y)在平行四边形ABCD的内部,则z=2x-5y的取值范围是

    A.(-14,16)

    B.(-14,20)

    C.(-12,18)

    D.(-12,20)

    开始考试点击查看答案
  • 6设D是正△P1P2P3及其内部的点构成的集合,点P0是△P1P2P3的中心.若集合S={P|P∈D,|PP0|≤|PPi|,i=1,2,3},则集合S表示的平面区域是

    A.三角形区域

    B.四边形区域

    C.五边形区域

    D.六边形区域

    开始考试点击查看答案
  • 7设不等式组http://picflow.koolearn.com/upload/papers/g02/20110518/201105181128395531529.gif所表示的平面区域为Dn,记Dn内的格点(横坐标和纵坐标均为整数的点)的个数为an,则an=

    A.3n

    B.4n

    C.5n

    D.6n

    开始考试点击查看答案
  • 8不等式组http://picflow.koolearn.com/upload/papers/g02/20110813/201108130953363281766.gif表示的平面区域是一个

    A.三角形

    B.直角梯形

    C.等腰梯形

    D.矩形

    开始考试点击查看答案
  • 9设点P(x,y)满足:http://picflow.koolearn.com/upload/papers/g02/20110128/201101281434061291314.gif,则http://picflow.koolearn.com/upload/papers/g02/20110128/20110128143410535948.gif的取值范围是

    A.http://picflow.koolearn.com/upload/papers/g02/20110128/201101281434310511033.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110128/201101281434383631036.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110128/201101281434432851011.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110128/20110128143450004926.gif

    开始考试点击查看答案
  • 10设实数x,y满足http://picflow.koolearn.com/upload/papers/g02/20110112/201101121538499071282.gif,则http://picflow.koolearn.com/upload/papers/g02/20110112/20110112153853391975.gif的最小值是

    A.http://picflow.koolearn.com/upload/papers/g02/20110112/20110112153907719878.gif

    B.2

    C.3

    D.http://picflow.koolearn.com/upload/papers/g02/20110112/20110112153917328882.gif

    开始考试点击查看答案
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