位置:首页 > 题库频道 > 学历类 > 升学考试 > 高中(高考) > 数学(文科) > 高中数学代数与函数一其他练习题981

点(1,1)在下面各不等式表示的哪个区域中      

发布时间:2021-07-16

A.http://picflow.koolearn.com/upload/papers/g02/20120708/201207081025369841099.png

B.http://picflow.koolearn.com/upload/papers/g02/20120708/201207081025370111530.png

C.http://picflow.koolearn.com/upload/papers/g02/20120708/20120708102537036905.png

D.http://picflow.koolearn.com/upload/papers/g02/20120708/20120708102537063857.png

试卷相关题目

  • 1设x,y满足http://picflow.koolearn.com/upload/papers/g02/20120422/201204221506233871664.gif,若目标函数z=ax+y(a>0)的最大值为14,则a=

    A.1   

    B.2    

    C.23   

    D.http://picflow.koolearn.com/upload/papers/g02/20120422/20120422150623431979.gif

    开始考试点击查看答案
  • 2设第一象限内的点(x,y)满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120517/201205171542543882368.png,若目标函数z=ax+by(a>0,b>0)的最大值为40,则http://picflow.koolearn.com/upload/papers/g02/20120517/201205171542544301071.png的最小值为

    A.http://picflow.koolearn.com/upload/papers/g02/20120517/20120517154254476817.png

    B.http://picflow.koolearn.com/upload/papers/g02/20120517/20120517154254518629.png

    C.1

    D.4

    开始考试点击查看答案
  • 3若变量x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120331/201203311546473041714.gif,则目标函数z=x+2y的最大值是

    A.3

    B.4

    C.8

    D.10

    开始考试点击查看答案
  • 4已知满足条件x2+y2≤1的点(x,y)构成的平面区域面积为S1,满足条件[x]2+[y]2≤1的点(x,y)构成的平面区域的面积为S2,其中[x]、[y]分别表示不大于x,y的最大整数,例如:[-0.4]=-1,[1.6]=1,则S1与S2的关系是

    A.S1<S2

    B.S1=S2

    C.S1>S2

    D.S1+S2=π+3

    开始考试点击查看答案
  • 5如果实数x、y满足条件http://picflow.koolearn.com/upload/papers/g02/20111111/201111111415251871262.gif,那么2x-y的最大值为

    A.2

    B.1

    C.-2

    D.-3

    开始考试点击查看答案
  • 6曲线http://picflow.koolearn.com/upload/papers/g02/20120604/201206041152112321467.png在点(0,-2)处的切线与直线x=0和y=x+2所围成的区域内(包括边界)有一动点P(x,y),若z=2x-y,则z的取值范围是

    A.[-2,2]

    B.[-2,4]

    C.[-4,-2]

    D.[-4,2]

    开始考试点击查看答案
  • 7下面给出的四个点中,位于http://picflow.koolearn.com/upload/papers/g02/20120201/201202011555011681096.gif表示的平面区域内的点是

    A.(0,2)

    B.(-2,0)

    C.(0,-2)

    D.(2,0)

    开始考试点击查看答案
  • 8已知点M(a,b)在由不等式组http://picflow.koolearn.com/upload/papers/g02/20111217/201112171519492501168.gif确定的平面区域内,则点N(a+b,a-b)所在平面区域的面积是

    A.1

    B.2

    C.4

    D.8

    开始考试点击查看答案
  • 9若实数x,y满足条件http://picflow.koolearn.com/upload/papers/g02/20120517/201205171315099421231.png,目标函数z=x+y,则  

    A.zmax=0

    B.zmax=http://picflow.koolearn.com/upload/papers/g02/20120517/20120517131509983576.png

    C.zmin=http://picflow.koolearn.com/upload/papers/g02/20120517/20120517131510241576.png

    D.zmax=3

    开始考试点击查看答案
  • 10已知实数x ,y满足http://picflow.koolearn.com/upload/papers/g02/20120508/201205081358192233372.png,则z=x+4y的最大值为

    A.9

    B.17

    C.5

    D.15

    开始考试点击查看答案
返回顶部