首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
在平面直角坐标系中,已知抛物线L:y=ax2+(c﹣a)x+c经过点A(﹣3,0)和点B(0,﹣6),L关于原点O对称的抛物线为L′. (1)求抛物线L的表达式; (2)点P在抛物线L′上,且位...
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
在平面直角坐标系中如果抛物线y=3x2不动而把x轴y轴分别向上向右平移3个单位那么在新坐标系中此抛物
在平面直角坐标系中抛物线y=﹣x﹣12+2的顶点坐标是
(﹣1,2)
(1,2)
(2,﹣1)
(2,1)
在平面直角坐标系中如果抛物线y=2x2不动而把x轴y轴分别向上向右平移2个单位那么在新坐标系下抛物线
y=2(x + 2)
2
-2
y=2(x-2)
2
+ 2
y=2(x-2)
2
-2
y=2(x + 2)
2
+ 2
在平面直角坐标系xOy中设抛物线y2=4x的焦点为F.准线为lP.为抛物线上一点PA⊥lA.为垂足.
如图在平面直角坐标系xOy中已知直线lx-y-2=0抛物线C://y2=2pxp>0. 1若直线l
在平面直角坐标系中将抛物线y=x2﹣x﹣6向上下或向左右平移m个单位使平移后的抛物线恰好经过原点则|
1
2
3
6
已知抛物线y=ax2+bx+ca≠0在平面直角坐标系中的位置如图所示则下列结论中正确的是
a>0
b<0
c<0
a+b+c>0
在平面直角坐标系内将抛物线y=2x2向左平移1个单位再向下平移7个单位所得到的抛物线的解析式是___
在平面直角坐标系中将抛物线y=x2-x-6向上下或向左右平移m个单位使平移后的抛物线恰好经过原点则m
将抛物线y=所在的平面直角坐标系中的纵轴即y轴向左平移1个单位则原抛物线在新的坐标系下的函数关系式是
在平面直角坐标系中若抛物线y=3x2不动而把x轴y轴分别向上向右平移1个单位长度则在新的平面直角坐标
在平面直角坐标系中将抛物线y=3x2先向右平移1个单位再向上平移2个单位得到的抛物线的解析式是.
在平面直角坐标系中如果抛物线y=3x2不动而把x轴y轴分别向上向右平移3个单位那么在新坐标系中此抛物
y=3(x﹣3)
2
+3
y=3(x﹣3)
2
﹣3
y=3(x+3)
2
+3
y=3(x+3)
2
﹣3
在平面直角坐标系中把抛物线y=x2+1向上平移3个单位再向左平移1个单位则所得抛物线的解析式是.
如图在平面直角坐标系xOy中已知直线lx-y-2=0抛物线C.y2=2pxp>0.1若直线l过抛物线
在平面直角坐标系中A.-20B.1-6.若抛物线y=ax2+a+2x+2与线段AB有且仅有一个公共点
如图在平面直角坐标系xOy中已知抛物线y=ax2+bxa>0的顶点为C.与x轴的正半轴交于点A.它的
在空间直角坐标系中方程y2=2axa>0表示
xoy平面上的抛物线
母线平行于x轴的抛物柱面
母线平行于y轴的抛物柱面
母线平行于z轴的抛物柱面
在平面直角坐标系中将抛物线y=x2-x-6向上下或向左右平移m个单位使平移后的抛物线恰好经过原点则|
1
2
3
6
在平面直角坐标系中将抛物线y=3x2先向右平移1个单位再向上平移2个单位得到的抛物线的解析式是.
热门试题
更多
长为300m的春游队伍以vm/s的速度向东行进如图1和图2当队伍排尾行进到位置O时在排尾处的甲有一物品要送到排头送到后立即返回排尾甲的往返速度均为2vm/s当甲返回排尾后他及队伍均停止行进.设排尾从位置O开始行进的时间为ts排头与O的距离为S头m. 1当v=2时解答 ①求S头与t的函数关系式不写t的取值范围 ②当甲赶到排头位置时求S头的值在甲从排头返回到排尾过程中设甲与位置O的距离为S甲m求S甲与t的函数关系式不写t的取值范围 2设甲这次往返队伍的总时间为Ts求T与v的函数关系式不写v的取值范围并写出队伍在此过程中行进的路程.
如图在Rt△ABC中∠C=90°AB=5BC=4.点P是边AC上一动点过点P作PQ∥AB交BC于点QD为线段PQ的中点当BD平分∠ABC时AP的长度为
时下正是海南百香果丰收的季节张阿姨到“海南爱心扶贫网”上选购百香果若购买2千克“红土”百香果和1千克“黄金”百香果需付80元若购买1千克“红土”百香果和3千克“黄金”百香果需付115元.请问这两种百香果每千克各是多少元
8分Ithasbeenseenasahi﹣techbike﹣sharingboomthatentrepreneurshopewillmakethemrichwhiletransformingChina'straffic﹣jammedcities.Butoccasionallydreamscanturnlesspleasant.InthesouthernChinesecityofShenzhenmorethan500bicyclesforhirehavebeenfounddumpedinhugepilesonthestreetsaccordingtoreports.Picturesshowedvehiclesnearlythreemetreshighwithsmallpartsontheground.Citystreetsaroundthecountryhaveseenanexplosionofthecolourfulbikesthatuserscanrentondemandwithasmartphoneappandthenparkwherevertheychoose.ThesharingeconomyistakingoffinChinawhereride﹣sharingandAirbnbareincreasinglycommonplace.FromShanghaitoSichuanprovincebike﹣sharingarebeingstartedinanefforttoreducetrafficjamandairpollutionbyputtingacountryonceknownasthe'KingdomofBicycles'backontwowheels.CompaniessuchasOfoandMobikewiththeiryellowandorangebikeshavebeeninacut﹣throatbattleforcustomers.Butproblemshavearisenwhenclientshaveabandonedtheircycles.'Somepeoplethesedaysjusthavereallybadcharacter'amannamedHewholivesnearwherethepilesappearedtoldtheSouthernMetropolisDaily.'Whenthey'redoneusingthebiketheyjustthrowitawaysomewherebecausethey'vealreadypaid.Residentstoldthepaperthatbikeshadbeenpilingupoverthepastweekeitherparkedrandomlybycarelessusersorpiledbylocalsecurityguardstryingtoclearnarrowresidentialalleysandfootpaths.ZhuangChuangyuarepresentativeatShenzhen'smunicipalpeople'scongresssaidthecityneededtostepupregulationofthebike﹣sharingindustryinordertoimprovetrafficconditionsandsafetystandardsespeciallysinceschoolchildrenoftenusedthebikes.In1980almost63%ofcommuterscycledtoworktheBeijingMorningPostreportedin2015citinggovernmentdata.Butby2000thatnumberhaddecreasedto38%andtodayitstandsatlessthan12%.Carusemeanwhilehasrocketed.In2010ChinaovertooktheUStobecometheworld'slargestcarmarketwith13.5mvehiclessoldinjust12months.24.Whycanwesaybike﹣sharinginChinaisaboom?A.Becauseentrepreneurswillbecomerichbecauseofit.B.BecauseitwilltransformChina'straffic﹣jammedcities.C.Becausevehiclesarenearlythreemetreshigh.D.Becausecitystreetshaveseenanincreaseofit.25.Whatismentionedaboutthesharingeconomy?A.Itreferstosmartphonesandapps.B.Airbnbhasbeenacommonthing.C.Chinahastakenastepinit.D.ItiswidespreadacrossChina.26.WhatdoweknowaboutOfoandMobike?A.Theyareyellowandorangebikes.B.Theyareincompetitionwitheachother.C.Theycausetheclientstoabandontheircycles.D.Theyhavereallybadcharacter.27.Whichofthefollowingmaytheauthoragreewith?A.Carelessusersandlocalguardsaretoblameforthepilingbikes.B.Regulationsshouldbestrictforschoolchildren.C.Manyuserslackproperbehaviorinusingthebikes.D.ChinaovertooktheUSbecomingbackontwowheels.
规定→2表示向右移动2记作+2则←3表示向左移动3记作
如图函数y=的图象所在坐标系的原点是
小明总结了以下结论 ①ab+c=ab+ac ②ab﹣c=ab﹣ac ③b﹣c÷a=b÷a﹣c÷aa≠0 ④a÷b+c=a÷b+a÷ca≠0 其中一定成立的个数是
有个填写运算符号的游戏在“1□2□6□9”中的每个□内填入+﹣×÷中的某一个可重复使用然后计算结果. 1计算1+2﹣6﹣9 2若1÷2×6□9=﹣6请推算□内的符号 3在“1□2□6﹣9”的□内填入符号后使计算所得数最小直接写出这个最小数.
8分AreportbytheUS'OpenSyllabusProjectfoundthatthemostreadbooksamongUScollegestudentsinthepastyearwerethelikesofTheRepublicbyancientGreekphilosopherPlatoandTheClashofCivilizationsbyUSpoliticalscientistSamuelHuntington.AndaccordingtoreportsreleasedbyChinesecollegelibrariesthemostpopularbooksamongChinesestudentsarenovelslikeJourneyUndertheMidnightSunbyJapanesewriterKeigoHigashinoandDemi﹣GodsandSemi﹣Devils天龙八部byChineseauthorLouisCha.ThisisconsideredbymanytobeoneofthereasonswhyChinesestudentsaresometimesnotasgoodatcriticalthinkingorobservingglobalperspectivesasUSstudents﹣theyreadtoomanybestsellernovels.'Byreadingtextsinsocialstudiesscienceandotherdisciplinesstudentsbuildafoundationofknowledgeinthesefieldsthatwillalsogivethemthebackgroundtobebetterreadersinallareas'RobertPondisciovicepresidentoftheCoreKnowledgeFoundationintheUStoldTheWashingtonPost.AccordingtoChinaYouthDailythereareusuallyfivestageswhenitcomestoreadingwithpopularnovelsatthebottom.Moreadvancedreadersnormallygoontoreadclassicfictionalliteraturehistoryandphilosophyorbookswithcriticalideas.Thefifthstageinvolvesstudentsmakingtheirownreadinglistsbasedontheideological意识形态的systemstheyhavebuiltthroughouttheyears.Wespendhoursdaysorevenweeksonabooksoit'sonlynaturalthatwewanttolearnsomethingusefulinreturnforourefforts.Manyseereadingasaninvestmentinthemselves.Butthispracticalviewofliteratureandthethoughtthathistoryandphilosophybooksaresuperiortonovelsisnotagreedbyeveryone.Afterallwhattheyofferaretwodifferentkindsofsatisfaction.Whiletheformerprovidesknowledgethelatterbringssentimental情感的experiences.'Fictionandpoetryaremedicines'UKwriterJeanetteWintersononcewrote.'Whattheyhealistherupture裂痕realitymakesontheimagination.'24.Thepurposeofparagraphoneisto.A.comparethepopularbooksbetweentheUSandChinesestudents.B.introducethedifferentdiscoveriesfromChinaandtheUS.C.analyzetheculturaldifferencesofthetwocountries.D.statewhyChinesestudentsaresometimesnotgoodatcriticalthinking25.Toknowsomethingineachareastudentsshouldread.A.famousnovelswhichhaswonmanyprizesB.textsinsocialstudiesandotherdisciplinesC.modernmagazineswhichhavegainedgreatpopularityD.sciencefictionsinvolvingknowledgeinmanyareas26.AccordingtoChinaYouthDailywhichisthehigheststagewhilereading?A.Booksbasedonthereaders'thought.B.Classicfictionalliterature.C.Bookswithcriticalideas.D.Popularnovels.27.Whatcanweinferfromthelasttwoparagraphs?A.Historybooksaresuperiortonovels.B.JeanetteWintersonthoughtfictionandpoetryarealsouseful.C.Philosophybookshelpthereadersgetemotionalexperience.D.Thewriterpreferstoreadthehistoricalandscientificbooks.
如图⊙O与正五边形ABCDE的边ABDE分别相切于点BD则劣弧所对的圆心角∠BOD的大小为度.
如图是由5个大小相同的小正方体摆成的几何体它的俯视图是
如图是某区域的平面示意图码头A在观测站B的正东方向码头A的 北偏西60°方向上有一小岛C小岛C在观测站B的北偏西15°方向上码头A到小岛C的距离AC为10海里. 1填空∠BAC=度∠C=度 2求观测站B到AC的距离BP结果保留根号.
如图抛物线C1y=x2﹣2x与抛物线C2y=ax2+bx开口大小相同方向相反它们相交于OC两点且分别与x轴的正半轴交于点B点AOA=2OB. 1求抛物线C2的解析式 2在抛物线C2的对称轴上是否存在点P使PA+PC的值最小若存在求出点P的坐标若不存在说明理由 3M是直线OC上方抛物线C2上的一个动点连接MOMCM运动到什么位置时△MOC面积最大并求出最大面积.
图2是图1中长方体的三视图若用S表示面积S主=x2+2xS左=x2+x则S俯=
有2019个数排成一行对于任意相邻的三个数都有中间的数等于前后两数的和.如果第一个数是0第二个数是1那么前6个数的和是这2019个数的和是.
语句“x的与x的和不超过5”可以表示为
8分'There'samistake.‘Moonlight'youguyswonbestpicture.'AndwiththosewordsproducerJordanHorowitzof'LaLaLand'toldthecastandcrewofacompetingfilmthatithadwontheOscars'biggestaward.PresentersWarrenBeattyandFayeDunawayweregiventhewrongcategory'senvelopebeforetheywentonstage.BeattywasclearlyconfusedaboutwhathesawwhenheopenedtheenvelopebutDunawayreadthenameofthefilmlistedbelowStone'sname.Theactorsandproducersfrom'LaLaLand'lefttheirseatsandfilledthestagetoaccepttheirOscarstatues.TheygavemanyspeechesbeforeHorowitzinterrupted.'Thisisnotajoke.Moonlighthaswonbestpicture'hesaid.HetookthecardfromBeattyandhelditupforthecameras.'Moonlight.BestPicture'hesaidasthecameramovedcloser.Theshow'shostJimmyKimmelmadethebestofthesituation.HewentuptoBeattyandexclaimed'Warren.Whatdidyoudo?'Kimmelalsosaid'PersonallyIblameSteveHarvey.'ThatwasinreferencetothemistakeHarveymadein2015attheMissUniversepageant.HeannouncedthewrongwinnerfirstsayingitwasthecontestantfromColombiaandthenrealizingthecorrectwinnerwasactuallyfromthePhilippines.OnceorderhadbeenrestoredBeattytriedtoexplainwhathappenedsayinghehadbeengiventhewrongenvelope.BarryJenkinsisthewriteranddirectorof'Moonlight.'Oncehereachedthestagehesaid'eveninmydreamsthiscannotbetrue.'Stonehappytohavewonthebestactressawardlatersaid'isthatthecraziestOscarmomentofalltime?Cool!'Manypeoplearewonderinghowthemistakewasmade.TheaccountingfirmPricewaterhouseCoopershasbeenhandlingOscarvotesforover80yearswithoutanyproblems.Thefirmapologizedtoallofthepeoplewhoweremadeuncomfortablebythemistake.Itpromisedtoinvestigatewhatcausedtheerror.Horowitzisbeingcreditedforstayingcalmandstoppingtheshowtocorrecttheerror.Peoplearecallinghim'gracious''agreatproducer'and'classy.'EvenJenkinssaid'muchrespecttothatdude.'32.WhatcanweknowfromthewordsofHorowitz?A.LaLaLandwonthebestpicture.B.BeattyandDunawaymadeamistake.C.TheOscars'biggestawardbelongstoMoonlight.D.Horowitzwasgiventhewrongenvelope.33.HowdidJimmyKimmeldealwiththesituation?A.Hewasconfusedandopenedtheenvelope.B.Hesavedtheembarrassingoccasion.C.Hemadefunofthesituation.D.HepointedoutWarren'smistake.34.Itcanbeinferredfromthetext.A.Beattymadethemistake.B.BarryJenkinssuspectedtheresult.C.ThefaultisduetoPricewaterhouseCoopers.D.Horowitzisbeingrespectedforhisreaction.35.Thebesttitleofthetextshouldbe.A.Whomadethemistake?B.TheOscars'biggestaward.C.Amix﹣upintheAcademyAward.D.Pricewaterhousetakestheresponsibility.
30分IrecentlyattendedaspecialservicecalledNightofKindness.ThisnightwasaboutaprojectcalledKindnessWaterwhichwas41byPhillipWagner.Onedayhewasreadingthenewspaperand42astoryaboutAfricaandwas43tolearnthatlimitedaccesstocleandrinkingwaterkills3.6millionpeopleperyear.Heknewhehadtohelp.He44donationsfromfriendsfamilyandchurchestohelpdigawellinaMalawaivillagethencreatedabottledwatercompanythatdonates100%ofthe45tobuildingmorewells.WithinayearsalesofKindnesswatersupportedtwoprojectsinUganda.SincethenKindnessWaterhas46550wellsin19countrieshelpingmorethan325000people.Whatan47!Buthereiswhatreally48meItallstartedwithonemanPhillipWagnerandhisdesiretomakeadifference.Hesawaneedand49with'Ihavetohelp.'Thousandsofotherswhoreadthesame50thatmorningmighthavealsobeensurprisedand51affecteddeeplywhentheylearnedthefact.Butallthosepeopledidn't52.Theythought'Ohwell.That'stoobad.53somebodywillhelpthosepeoplewhodon'thaveanycleanwater.'PhillipWagnerdecidedtobethatsomebodyand54thehelpofthousandsofotherswhohavejoinedheismakingadifferencetotheworld.Yousee55changestartswithordinarypeopledoingtheirpart.Iwanttobeoneofthose56makers.AsavideoofchildrensmilingandswimmingincleanwaterrolledinthebackgroundPhillipWagnersaidIjustwantyoutoknowthatI57myalldidmybestbroughthappinesstosomeoneand58thisworldalittlebetterjustbecauseIwashere.'Let'sliveoutthosewordstoday.59youchoosetovolunteerathomelesssheltersor60anyothergooddeedsforthoseinneedlet'sbedifferencemakers.Let'sleavethisworldalittlebetter.41.A.founded B.scheduled C.hosted D.attended42.A.figureout B.commentedon C.madeup D.cameacross43.A.willing B.shocked C.guilty D.lucky44.A.matched B.appreciated C.gathered D.applied45.A.resources B.profits C.products D.taxes46.A.filled B.rented C.built D.bought47.A.breakthrough B.consequence C.advantage D.influence48.A.changed B.touched C.frightened D.excited49.A.responded B.shared C.played D.connected50.A.book B.magazine C.article D.picture51.A.ever B.often C.never D.even52.A.act B.ignore C.beg D.participate53.A.Personally B.Sincerely C.Fortunately D.Hopefully54.A.under B.from C.with D.by55.A.real B.hard C.little D.creative56.A.decision B.dream C.water D.difference57.A.showed B.gave C.lost D.threw58.A.left B.guided C.promised D.kept59.A.If B.Whether C.Since D.Before60.A.record B.remember C.perform D.know
如图若b是正数直线ly=b与y轴交于点A直线ay=x﹣b与y轴交于点B抛物线Ly=﹣x2+bx的顶点为C且L与x轴右交点为D. 1若AB=8求b的值并求此时L的对称轴与a的交点坐标 2当点C在l下方时求点C与l距离的最大值 3设x0≠0点x0y1x0y2x0y3分别在la和L上且y3是y1y2的平均数求点x00与点D间的距离 4在L和a所围成的封闭图形的边界上把横纵坐标都是整数的点称为“美点”分别直接写出b=2019和b=2019.5时“美点”的个数.
当m=﹣1时代数式2m+3的值是
一次抽奖活动特等奖的中奖率为把用科学记数法表示为
分式方程=1的解是
某球室有三种品牌的4个乒乓球价格是789单位元三种.从中随机拿出一个球已知P一次拿到8元球=. 1求这4个球价格的众数 2若甲组已拿走一个7元球训练乙组准备从剩余3个球中随机拿一个训练. ①所剩的3个球价格的中位数与原来4个球价格的中位数是否相同并简要说明理由 ②乙组先随机拿出一个球后放回之后又随机拿一个用列表法如图求乙组两次都拿到8元球的概率.
如图已知抛物线y=ax2+bx+5经过A﹣50B﹣4﹣3两点与x轴的另一个交点为C顶点为D连结CD. 1求该抛物线的表达式 2点P为该抛物线上一动点与点BC不重合设点P的横坐标为t. ①当点P在直线BC的下方运动时求△PBC的面积的最大值 ②该抛物线上是否存在点P使得∠PBC=∠BCD若存在求出所有点P的坐标若不存在请说明理由.
某路口的交通信号灯每分钟红灯亮30秒绿灯亮25秒黄灯亮5秒当小明到达该路口时遇到绿灯的概率是
对于题目“如图1平面上正方形内有一长为12宽为6的矩形它可以在正方形的内部及边界通过移转即平移或旋转的方式自由地从横放移转到竖放求正方形边长的最小整数n.”甲乙丙作了自认为边长最小的正方形先求出该边长x再取最小整数n. 甲如图2思路是当x为矩形对角线长时就可移转过去结果取n=13. 乙如图3思路是当x为矩形外接圆直径长时就可移转过去结果取n=14. 丙如图4思路是当x为矩形的长与宽之和的倍时就可移转过去结果取n=13. 下列正确的是
如图在平面直角坐标系中已知点A21点B3﹣1平移线段AB使点A落在点A1﹣22处则点B的对应点B1的坐标为
如图约定上方相邻两数之和等于这两数下方箭头共同指向的数. 示例即4+3=7 则1用含x的式子表示m= 2当y=﹣2时n的值为.
根据圆规作图的痕迹可用直尺成功找到三角形外心的是
10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改.增加在缺词处加一个漏字符号∧并在其下面写出该加的词.删除把多余的词用斜线\划掉.修改在错的词下面画一横线并在该词下面写出修改后的词.注意1.每处错误及其修改均仅限一词;2.只允许修改10处多者从第11处起不计分.WuYishuwhostudyataHighSchoolinShanghaicameoutontopintheChinesePoetryCompetition.InanearlierpartWushockedtheaudiencewhenperformedinasectionentitled'Feihualing'.Thegame'sthemewas'yue'meaning'moon'or'month'inChinese.SherecitedlinestheClassicofPoetry诗经theearlycollectionofpoemsinChina'InJulythecricketsareinthefield;InAugusttheyareontheyard;InSeptembertheyareatthedoor;InOctoberthecricketsenterandcrawlunderourbeds.七月在野八月在宇九月在户十月蟋蟀入我床下.'Irealadmireherknowledgeofpoems'saidHuangZijin16asenior2studentfromNingboHighSchoolintheZhejiangprovince.'ThefirsttimeIsawherwearingtraditionHanclothingonTVIwasveryimpressedbyhisclassicallooks.ShefulfillsallmyfantasiesforclassicChinesewomen'stalents.What'smoreshealwaysappearssocalmthroughouttheshowthatisveryunusualforherage.'
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
高一上学期物理