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已知直线l:kx-y+=0,曲线C=y=,若直线l与曲线C相交于A、B两点,则k的取值范围是 ;|AB|的最小值是 .
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高二下学期数学《》真题及答案
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已知曲线C.的极坐标方程是ρ=2cosθ以极点为平面直角坐标系的原点极轴为x轴的正半轴建立平面直角坐
定义曲线C.上的点到直线l的距离的最小值称为曲线C.到直线l的距离.已知曲线C1y=x2+a到直线l
已知曲线C.y=x2x≥0直线l为曲线C.在点A.11处的切线.Ⅰ求直线l的方程Ⅱ求直线l与曲线C.
定义曲线C.上的点到直线l的距离的最小值称为曲线C.到直线l的距离.已知曲线C.1y=x2+a到直线
在直角坐标系xOy中以O.为极点x轴的正半轴为极轴建立极坐标系曲线C.ρ2﹣4ρcosθ+1=0直线
2012年高考浙江卷理科16定义曲线C.上的点到直线l的距离的最小值称为曲线C.到直线l的距离.已知
已知直线l的方程是fxy=0点Mx0y0不在l上则方程fxy-fx0y0=0表示的曲线是
直线l
与l垂直的一条直线
与l平行的一条直线
与l平行的两条直线
已知曲线C.直线L.1写出曲线C.的参数方程和直线L.的普通方程2设直线L.与曲线C.交于A.B.两
定义:曲线C.上的点到直线l的距离的最小值称为曲线C.到直线l的距离.已知曲线C1:y=x2+a到直
定义曲线C.上的点到直线l的距离的最小值称为曲线C.到直线l的距离.已知曲线C1y=x2+a到直线l
已知极点与坐标原点重合极轴与x轴非负半轴重合两个坐标系单位长度相同已知直线lt为参数曲线C.的极坐标
定义曲线C.上的点到直线l的距离的最小值称为曲线C.到直线l的距离.已知曲线C.1y=x2+a到直线
已知直线ly=ax+1-aa∈R若存在实数a使得一条曲线与直线l有两个不同的交点且以这两个交点为端点
①④
②③
②④
②③④
已知点A.-30B.30动点P.满足|PA|=2|PB|.1若点P.的轨迹为曲线C.求此曲线的方程2
已知直线l1为曲线y=fx=x2+x-2在点10处的切线l2为该曲线的另外一条切线且l1⊥l2.Ⅰ求
若直线l与曲线C.满足下列两个条件1直线l在点P.x0y0处与曲线C.相切2曲线C.在点P.附近位于
已知曲线直线l过A.a0B.0-b两点原点O.到l的距离是Ⅰ求双曲线的方程Ⅱ过点B.作直线m交双曲线
已知曲线C.上任意一点到点F.10的距离比到直线x+2=0的距离小1点P40.Ⅰ求曲线C.的方程Ⅱ设
已知直线l过点0-1且与曲线y=xlnx相切则直线l的方程为________.
已知曲线C.y=x3-3x2+2x直线ly=kx且直线l与曲线C.相切于点x0y0x0≠0求直线l的
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Mr.PeterJohnsonagedtwenty﹣threebattledforhalfanhourtoescapefromhistrappedcaryesterdaywhenitlandedupsidedowninthreefeetofwater.Mr.Johnsontooktheonlyescaperoute﹣﹣throughtheboot行李箱. Mr.Johnson'scarhadfinishedupinaditch沟渠atRomneyMarsinKentafterskiddingoniceandhittingabank.FortunatelythewaterbegantocomeinonlyslowlyMr.JohnsonsaidIcouldn'tforcethedoorsbecausetheywerejammedagainstthewallsoftheditchanddarednotopenthewindowsbecauseIknewwaterwouldcomefloodingin. Mr.JohnsonasweetsalesmanofSittingHomeKentfirsttriedtoattracttheattentionofothermotoristsbysoundingthehornandhammeringontheroofandboot.Thenhebeganhisstruggletoescape. LaterhesaidItwasreallyahalfpennythatsavedmylife.ItwastheonlycoinIhadinmypocketandIusedittounscrewthebackseattogetintotheboot.Ihammereddesperatelywithahammertryingtomakesomeonehearbutnohelpcame. Ittooktenminutestounscrewtheseatandafurtherfiveminutestoclearthesweetsamplesfromtheboot.ThenMr.Johnsonfoundawrenchandbegantoworkonthebootlock.Fifteenminutespassedby.ItwastheonlychanceIhad.FinallyitgavebutassoonasImovedthebootlidthewaterandmudpouredin.Iforcedtheliddownintothemudandscrambledclearasthecarfilledup. HishandsandarmscutandbruisedMr.JohnsongottoBeckettFarmnearbywherehewaslookedafterbythefarmer'swifeMrs.LucyBates.TremblinginablankethesaidThatthirtyminutesseemedlikehours.Onlythetipsofthecarwheelswerevisiblepolicesaidlastnight.Thevehiclehadsunkintotwofeetofmudatthebottomoftheditch. 1Inwhichsectionofanewspapercanwereadthisarticle? A.Bookreview B.Newsreport C.Campuslife D.Continuedstory 2TheunderlinedsentenceinParagraph5Finallyitgavemeansthat. A.luckilythedoorwastornawayintheend B.atlastthewrenchwentbroken C.thelockcameopenafterallhisefforts D.thechancewaslostatthelastminute 3Itcanbeinferredfromthepassagethat. A.theditchwasalongaquietcountryroad B.theaccidenthappenedonaclearwarmday C.thepolicehelpedMr.Johnsongetoutoftheditch D.Mr.Johnsonhadatenderwifeandwaswellattended
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