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

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  

发布时间:2021-07-16

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

试卷相关题目

  • 1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
  • 2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
  • 3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
  • 4点(1,1)在下面各不等式表示的哪个区域中      

    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

    开始考试点击查看答案
  • 5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
  • 6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
  • 7已知x ,y 满足http://picflow.koolearn.com/upload/papers/g02/20120505/201205051135446851017.png,且目标函数z=3x+y的最小值是5,则z的最大值是

    A.10

    B.12

    C.14

    D.15

    开始考试点击查看答案
  • 8不等式组http://picflow.koolearn.com/upload/papers/g02/20120322/201203221354146991500.gif表示的平面区域的面积是

    A.4http://picflow.koolearn.com/upload/papers/g02/20120322/20120322135414709918.gif

    B.4

    C.2http://picflow.koolearn.com/upload/papers/g02/20120322/20120322135414721918.gif

    D.2

    开始考试点击查看答案
  • 9已知点P(x,y)的坐标满足|x|+|y|≤1,那么2x+y的最小值是  

    A.-3

    B.-2

    C.-1

    D.2

    开始考试点击查看答案
  • 10如图,在平面直角坐标系中,Ω是一个与x轴的正半轴、y轴的正半轴分别相切于点C.D的定圆所围成的区域(含边界),

    B.C.D是该圆的四等分点.若点P(x,y)、点P′(x′,y′)满足x≤x′且y≥y′,则称P优于P′。如果Ω中的点Q满足:不存在Ω中的其它点优于Q,那么所有这样的点Q组成的集合是劣弧http://picflow.koolearn.com/upload/papers/g02/20120114/201201141125059841653.gif A.http://picflow.koolearn.com/upload/papers/g02/20120114/20120114112506000893.gif     B.http://picflow.koolearn.com/upload/papers/g02/20120114/20120114112506015891.gif C.http://picflow.koolearn.com/upload/papers/g02/20120114/20120114112506078896.gif D.http://picflow.koolearn.com/upload/papers/g02/20120114/20120114112506093894.gif

    开始考试点击查看答案
返回顶部