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不等式2x+y-6>0表示的平面区域在直线2x+y-6=0的

发布时间:2021-07-16

A.左上方

B.右上方

C.左下方

D.右下方

试卷相关题目

  • 1某企业生产甲、乙两种产品,已知生产每吨甲产品要用A原料3吨、B原料2吨;生产每吨乙产品要用A原料1吨、B原料3吨,销售每吨甲产品可获得利润5万元、每吨乙产品可获得利润3万元,若该企业在一个生产周期内消耗A原料不超过13吨、B原料不超过18吨,那么该企业可获得最大利润是

    A.20万元

    B.25万元

    C.27万元

    D.30万元

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  • 2不在不等式3x+2y<6表示的平面区域的是点

    A.(0,0)

    B.(1,1)

    C.(0,2)

    D.(2,0)

    开始考试点击查看答案
  • 3设点P(x,y)满足不等式组http://picflow.koolearn.com/upload/papers/g02/20101227/201012271617105491226.gif,则http://picflow.koolearn.com/upload/papers/g02/20101227/201012271617150021050.gif的最大值和最小值分别为

    A.-9,-11

    B.-11http://picflow.koolearn.com/upload/papers/g02/20101227/20101227161817156887.gif,-9

    C.-11http://picflow.koolearn.com/upload/papers/g02/20101227/20101227161828265887.gif,-9http://picflow.koolearn.com/upload/papers/g02/20101227/20101227161831218887.gif

    D.9http://picflow.koolearn.com/upload/papers/g02/20101227/20101227161838812887.gif,-11

    开始考试点击查看答案
  • 4http://picflow.koolearn.com/upload/papers/g02/20110524/201105240945047341122.gif,则目标函数z=x+2y的取值范围是

    A.[3,5]

    B.[2,5]

    C.[3,6]

    D.[2,6]

    开始考试点击查看答案
  • 5不等式组http://picflow.koolearn.com/upload/papers/g02/20110518/201105181449122401454.gif表示的平面区域是

    A.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181449122561902.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181449122721485.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181449122871553.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110518/201105181449123192211.gif

    开始考试点击查看答案
  • 6若点P(x0,y0)和点A(1,2)在直线l:3x+2y-8=0的异侧,则

    A.3x0+2y0>0

    B.3x0+2y0<0

    C.3x0+2y0>8

    D.3x0+2y0<8

    开始考试点击查看答案
  • 7已知点(3,1)和(-4,6)在直线3x-2y+a=0的两侧,那么实数a的取值范围是

    A.a<-7或a>24

    B.-7<a<24

    C.a=-7或a=24

    D.以上都不对

    开始考试点击查看答案
  • 8已知D是不等式组http://picflow.koolearn.com/upload/papers/g02/20110523/201105231458356941369.gif所确定的平面区域,则圆x2+y2=4在区域D内的弧长为

    A.http://picflow.koolearn.com/upload/papers/g02/20110523/20110523145835709939.gif

    B.http://picflow.koolearn.com/upload/papers/g02/20110523/20110523145835725944.gif

    C.http://picflow.koolearn.com/upload/papers/g02/20110523/20110523145835756988.gif

    D.http://picflow.koolearn.com/upload/papers/g02/20110523/20110523145835787991.gif

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  • 9若实数x,y满足http://picflow.koolearn.com/upload/papers/g02/20110613/201106131439381711159.gif,则x+y的最小值是

    A.4

    B.3

    C.2

    D.1

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  • 10设x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20110603/201106031357038571219.gif,则(x+1)2+y2的最大值为

    A.80    

    B.http://picflow.koolearn.com/upload/papers/g02/20110603/20110603135703873906.gif   

    C.25  

    D.http://picflow.koolearn.com/upload/papers/g02/20110603/20110603135703904903.gif

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