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

若变量x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120919/201209191646320233445.png,则z=2x+y﹣4的最大值为 

发布时间:2021-07-16

A.﹣4

B.﹣1

C.1

D.5

试卷相关题目

  • 1已知变量x,y满足http://picflow.koolearn.com/upload/papers/g02/20120916/201209161625434593539.png,则z=|y﹣x|的最大值为

    A.1

    B.http://picflow.koolearn.com/upload/papers/g02/20120916/201209161625436171037.png

    C.3

    D.http://picflow.koolearn.com/upload/papers/g02/20120916/20120916162543752642.png

    开始考试点击查看答案
  • 2设P(x,y)是图中的四边形内的点或四边形边界上的点,则z=2x+y的最大值是http://picflow.koolearn.com/upload/papers/g02/20120916/201209162002332646017.png

    A.﹣2

    B.﹣1

    C.1

    D.2

    开始考试点击查看答案
  • 3设x,y满足http://picflow.koolearn.com/upload/papers/g02/20120914/201209142015380804329.png,若目标函数z=ax+y(a>0)最大值为14,则a为

    A.http://picflow.koolearn.com/upload/papers/g02/20120914/20120914201538220950.png

    B.23

    C.2

    D.1

    开始考试点击查看答案
  • 4已知实数x、y满足http://picflow.koolearn.com/upload/papers/g02/20120831/201208312110022363241.png,则2x+y的最小值是

    A.﹣3

    B.﹣2

    C.2

    D.1

    开始考试点击查看答案
  • 5某公司生产甲、乙两种桶装产品,已知生产甲产品1桶需耗A原料1千克、B原料2千克;生产乙产品1桶需耗A原料2千克,B原料1千克,每桶甲产品的利润是300元,每桶乙产品的利润是400元.公司在生产这两种产品的计划中,要求每天消耗

    A.B原料都不超过12千克.通过合理安排生产计划,从每天生产的甲、乙两种产品中,公司共可获得的最大利润是 A.1800元

    B.2400元

    C.2800元

    D.3100元

    开始考试点击查看答案
  • 6已知向量http://picflow.koolearn.com/upload/papers/g02/20120918/201209181740243962616.png,且http://picflow.koolearn.com/upload/papers/g02/20120918/20120918174024544950.png,若变量x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120918/201209181740246573315.png则z的最大值为

    A.1

    B.2

    C.3

    D.4

    开始考试点击查看答案
  • 7已知O是坐标原点,点A(1,2),若点M(x,y)为平面区域http://picflow.koolearn.com/upload/papers/g02/20120918/201209181644262573506.png上的一个动点,则http://picflow.koolearn.com/upload/papers/g02/20120918/201209181644266231258.png的最大值是

    A.﹣1

    B.http://picflow.koolearn.com/upload/papers/g02/20120918/20120918164426907582.png

    C.2

    D.1

    开始考试点击查看答案
  • 8已知变量x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120915/20120915101831608777.png,则z=3x+y的最大值为

    A.12

    B.11

    C.3

    D.-1

    开始考试点击查看答案
  • 9已知x,y∈R,且http://picflow.koolearn.com/upload/papers/g02/20120914/201209141951238183922.pnghttp://picflow.koolearn.com/upload/papers/g02/20120914/201209141951239371642.png的最大值是

    A.http://picflow.koolearn.com/upload/papers/g02/20120914/20120914195124051563.png

    B.http://picflow.koolearn.com/upload/papers/g02/20120914/20120914195124173845.png

    C.http://picflow.koolearn.com/upload/papers/g02/20120914/20120914195124288856.png

    D.7

    开始考试点击查看答案
  • 10设变量x,y满足约束条件:http://picflow.koolearn.com/upload/papers/g02/20120831/201208311425098963430.png.则目标函数z=2x+3y的最小值为

    A.6

    B.7

    C.8

    D.23

    开始考试点击查看答案
返回顶部