首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
直线l与抛物线C:y2=2x交于A,B两点,O为坐标原点,若直线OA,OB的斜率k1,k2满足k1k2=,则直线l过定点( )
查看本题答案
包含此试题的试卷
高二下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
已知抛物线Cy2=2pxp>0过点A120作直线MN垂直x轴交抛物线于MN两点ME⊥ON于EAE∥O
已知抛物线C.y2=2px过点P.11.过点0作直线l与抛物线C.交于不同的两点M.N.过点M.作x
设抛物线的顶点在坐标原点焦点F.在y轴正半轴上过点F.的直线交抛物线于A.B.两点线段AB的长是8A
已知抛物线C.的顶点在坐标原点焦点为F.0-1直线l与抛物线C.相交于A.B.两点若AB的中点为2-
过抛物线x2=8y的焦点F.的直线与其相交于A.B.两点O.为坐标原点.若|AF|=6则△OAB的面
已知倾斜角为60°的直线L经过抛物线y2=4x的焦点F且与抛物线相交于A.B两点其中O坐标原点.1求
已知抛物线y=x2﹣2mx+m2+m﹣1m是常数的顶点为P.直线ly=x﹣11求证点P.在直线l上2
已知抛物线C.y2=2pxp>0的焦点为F.抛物线C.与直线l1y=-x的一个交点的横坐标为8.1求
如图已知直线L:y=kx-2与抛物线C:x2=-2pyp>0交于AB两点O为坐标原点 求
已知E.22是抛物线C.:y2=2px上一点经过点20的直线l与抛物线C.交于A.B两点不同于点E.
已知抛物线y2=2x直线l过点02与抛物线交于M.N.两点以线段MN的长为直径的圆过坐标原点O.求直
已知抛物线C.的顶点在坐标原点焦点为F.10直线l与抛物线C.相交于A.B.两点.若AB的中点的坐标
过抛物线y2=4x焦点的直线交抛物线于A.B.两点已知|AB|=8O.为坐标原点则△OAB的重心的横
已知焦点在x正半轴上顶点为坐标系原点的抛物线过点A.1-2.1求抛物线的标准方程2过抛物线的焦点F.
已知倾斜角为45°的直线l过抛物线y2=4x的焦点且与抛物线交于
,
两点,则△OAB(其中O.为坐标原点)的面积为( ) A.2B.
8
如图已知直线L:y=kx-2与抛物线C:x2=-2pyp>0交于AB两点O为坐标原点 求
已知抛物线C.y2=2pxp>0的焦点为F.抛物线C.与直线l1y=-x的一个交点的横坐标为8.1求
.已知抛物线C.的顶点为坐标原点焦点在x轴上直线y=x与抛物线C.交于A.B.两点若P22为AB的中
已知直线l:2x-y+4=0与抛物线y=x2相交于A.B.两点O.是坐标原点试求与直线l平行的抛物线
已知直线l与抛物线y2=8x交于A.B.两点且l经过抛物线的焦点F.A.点的坐标为88则线段AB的中
热门试题
更多
OurMuseumsGalleriesandZoo 19world﹣classmuseumsgalleriesandazoo TheSmithsonianofferselevenmuseumsandgalleriesontheNationalMallandsixothermuseumsandtheNationalZoointhegreaterNationalCapitalArea.InNewYorkCityweinviteyoutotourtwomuseumsinhistoricsettings. NotnearaSmithsonianmuseum?Lookforexhibitionsandmuseumsinyourcommunity.Herewehavelistedsomeplacestovisit Tips&Guidelines StopatanySmithsonianmuseuminformationdeskwherefriendlyandknowledgeablestaffandvolunteerscanassistyouinplanningyourvisit. ServiceanimalsarewelcomeatthemuseumsandtheNationalZoo.Petsarenotpermitted. Lunchesshouldbeproperlyclosedorstoredinlockersduringyourvisit. 1TheSmithsonianoffersalltheseEXCEPT. A.galleries B.concerts C.museums D.zoos 2Ifyouareinterestedinanimalsyoucan. A.goto1661PennsylvaniaAvenueNWWashingtonDC B.goto8thandFStreetsNWWashingtonDC C.visitthemuseum11a.m.onChristmas D.visitthezooatweekendsonJune25 3Toarrangeyourvisitbetteryoucan. A.havelunchduringyourvisit B.takeyourpetsalongwithyou C.askthestaffandvolunteersforhelp D.fillinanapplicationformbeforeyourvisit
TheMonkeesbupabout1970buthappilytheyreunitedinthemid﹣1980﹩.
LearningFastandDeep Overthepastfiveyearsresearchersinartificialintelligencehavebecometherockstarsofthetechnologyworld.AbranchofAIknownasdeeplearningwhichusesneural神经的networkstoscanthroughlargevolumesofdatalookingforpatternshasprovensousefulthatskilledpractitionerscancommandhighsix﹣figuresalariestobuildsoftwareforAmazonAppleFacebookandGoogle. ThestandardrouteintothesejobshasbeenaPhDincomputersciencefromoneofAmerica'stopuniversities.Earningonetakesyearsandrequiresapersonalitysuitedtoacademiawhichisrareamongmorenormalfolk. Thatischanging. Lastmonthfast.aianon﹣profiteducationorganizationbasedinSanFranciscokickedoffthethirdyearofitscourseindeeplearning.Sinceitsfoundationithasattractedmorethan100000studentsaroundtheglobefromIndiatoNigeria.ThecourseandotherslikeitcomewithasimpleideathereisnoneedtospendyearsobtainingaPhDinordertopractisedeeplearning.Creatingsoftwarethatlearnscanbetaughtasacraftnotasahighintellectualpursuittobeundertakenonlyinanivorytower.Fast.ai'scoursecanbecompletedinjustsevenweeks. TomakeitaccessibletoanyonewhowantstolearnhowtobuildAIsoftwareistheaimofJeremyHowardwhofoundedfast.aiwithRachelThomasamathematician.Hesaysschoolmathematicsissufficient.No.Greek.LettersMr.Howardintonespoundingthetablewithhisfistforpunctuation. SomeexpertsworrythatthiswillserveonlytocreateafloodofunreliableAIsystemswhichwillbeuselessatbestanddangerousatworst.IntheearliestdaysoftheInternetonlyaselectfewnerdsnamelycomputerholicswithspecificskillscouldbuildapplications.Notmanypeopleusedthem.ThentheinventionoftheWorldWideWebledtoanexplosionofwebpagesbothgoodandbad.ButitwasonlybyopeninguptoallthattheInternetgavebirthtoonlineshoppinginstantglobalcommunicationsandsearch.IfMr.HowardandothershavetheirwaymakingthedevelopmentofAIsoftwareeasierwillbringforthanewcropoffruitofadifferentkind. 1Whatcanwelearnaboutdeeplearning? A.Itreplacesartificialintelligence. B.Itattractsrockstarstopractice. C.Itscanspatternsforlargecompanies. D.Ithelpstechnicianstocreatesoftware. 2Fast.aiisanorganizationthat. A.ensuresonetoobtainaPhD B.teachescraftinivorytower C.offersacourseindeeplearning D.requiresweekstoapply 3TheunderlinedwordsNo.Greek.LettersinParagraph5meansdoingfast.aicourseis. A.easy B.difficult C.interesting D.boring 4Itcanbeinferredfromthelastparagraphthat. A.itisquitereliableforanyonetograspartificialintelligence B.theInternethasbroughtforthafloodofuselessAIsystems C.openinguptoallleadstoinstantglobalsearchandonlineshopping D.simplifyingsoftwaredevelopmentmayresultinunexpectedoutcomes
ItwasMother'sDaybuttheyoungmotherwasalittleunhappybecauseshewas800milesawayfromherparents.Inthemorningshephonedhermother1wishherahappyMother'sDayandhermothertoldheraboutthebeautifullilacs丁香inthegarden.2latethatdaywhenshetoldherhusbandaboutthelilacshesaidIknowwherewecanfindallthatyouwant.Getthechildrenandcomeon.Sotheywent3drivedownthecountryroads. Thereonasmallhilltheysawalotof4beautypurplelilacs.Theyoungwomanranquicklytoenjoytheflowers.Carefullyshepickedafewhereandafewthere.Ontheirwayhometherewasasmile5herface.ziliaoqun700292070 Whentheywerepassinganursinghome养老院theyoungwomansaw6oldgrannysittinginachair.Shehadnochildrenwithher.They7stopthecarandtheyoungwomanwalkedtotheoldwomanputtheflowersinher8handandsmiledather.Theoldgrannythankedheragainandagain.Shesmiledhappilytoo. Whentheyoungmothercamebacktohercarherchildrenaskedher9isthatoldgranny?Whydidyougiveourflowerstoher? Idon'tknowher10theymothersaid.Butit'sMother'sDayandshehasnochildren.IhaveallofyouandIstillhavemymother.Justthinkhowmuchthoseflowersmeanttoher.
已知函数fx=sinxcosx+cos2x. 1求y=fx的最小正周期并求其单调递减区间 2△ABC的内角ABC所对的边分别为abc若fA=且A为钝角a=2求△ABC面积的最大值.
在数列{an}中a1=2an+1=an+n+1则a5=.
设fx=m+1x2﹣mx+m﹣1 1当m=1时解关于x的不等式fx>0 2若关于x的不等式fx﹣m>0的解集为12求m的值
一个长方体长宽分别为54且该长方体的外接球的表面积为50π则该长方体的表面积为
如图正方体ABCD﹣A1B1C1D1中AB的中点为MDD1的中点为NP为棱B1C1上一点则异面直线MP与CN所成角的大小为.
Ihavemadegreatprogressinmath.IbegintounderstandanoldsayingNopainsnog.
设函数fx=m+1x2﹣m2x+m﹣1. 1当m=1时解关于x的不等式fx>0 2若关于x的不等式∫x<0的解集为求m的值
TheSurprisinglyEasyTrickThatCanHelpYouUseYourPhoneaLittleBitLess ThefirstthingIdointhemorningsislookatmyphone.That'smainlybecausemyphoneismyalarmclockbutoncemyeyesareopenandthatscreenislitupinmyhandsit'sanawfullyshorttriptocheckingemailsandperusingheadlines.1Myemailsthatearlyinthemorningaremainlyjunkandtheheadlineswon'tchangemuchbeforeI'vebrushedmyteethandpouredacupofcoffeeright? MywifesaysI'maddictedtomyphone.2I'mnotterriblyactiveonsocialmediabutIdoenjoymesomeidlescrollingenjoyplayingthemobilephone.Andwowdothesetechcompaniesknowhowtokeepthosethumbsconstantlyswipingup. 3WhileIthinkwe'reprettygoodaboutlimitingherscreentimeitwouldseemthattechnologyhashaditshooksinmefromthestart.SoIdecidedtotrylooseningmyphone'sgrasponmyattentionbyswitchingthescreentoblackandwhite. Changingthedisplaytoblackandwhiteisveryeasy.InyouriPhone'ssettingschooseGeneralthenAccessibility.NextchooseDisplayAccommodationsthenColorFilters.Tapthetoggleonandalistoffiltersappears.4 ButnoonewantstogothroughallthiseverytimetheywanttoturncolorbackontocheckoutanInstagramstory.Clearlyyoudon'talwayswantyourscreentobeblackandwhite.Afteralltherewillunavoidablybephotostoviewandvideostoshare.5IntheAccessibilitymenutapAccessibilityShortcutandchooseColorFilters.Nowpressingthehomebuttonthreetimeswillswitchyourdisplaytocolorandthenbackwithanotherthree. A.There'snoreasonformetobedoingthis. B.We'vegotathree﹣year﹣oldchild. C.ChooseGrayscaleandyou'reallset. D.Itcanhelpyouuseyourphonealittlebitless E.IdisagreebutIcandefinitelystandtospendlesstimelookingatit. F.Herecomesasurprisinglyeasytrick. G.Thatiswhatmakessettingashortcutnecessary.
△ABC中内角ABC所对的边分别是abc且a+b2﹣c2=4C=120°则ab的值为.
若cosα﹣=cos2α则sin2α=
若函数fx=sinxcosx﹣cos2x+x∈R的图象上所有点纵坐标不变横坐标伸长到原来的2倍再向左平行移动个单位长度得函数y=gx的图象则函数y=gx﹣在区间[﹣2π4π]内的所有零点之和为
假设你是红星中学高三学生李华请根据以下四幅图的先后顺序写一篇英文周记记录上周你和同学参与国家博物馆庆祝改革开放四十周年大型展览Celebrating40thAnniversaryofReformandOpening﹣up志愿者活动的全过程. 注意词数不少于60提示词国家博物馆theNationalMuseumofChina
某几何体的三视图如图所示则该几何体的体积为
Whetheryoulikeitornotasstudentsyouhavetolivewithroommatesaftergoingtoschooloruniversity.Havingaroommatecanbeoneofthebestexperiencesoreasilyoneoftheworst.1 Herearefivetipsforyoutofollowtoavoidthecommonmistakesthatmakegoodroommaterelationshipsworse. Talkthingsout.2Ifsomethinghappenssitdownwithyourroommatesandhaveaface﹣to﹣faceconversation.Complainingaboutyourroommatesbehindtheirbackscreatesnothingbutbadsituationsandgeneralunhappiness. 3Someroommatesbecomethebestoffriendsandsomedon't.Don'tputpressureonyourselforyourroommatetoreachthislevelespeciallywhenyoufirstmeet.Rememberyouaretryingtomakeanewfriendnotfrightenyourroommateaway.Andifyouroommatedoesn'tendupbeingyourbestfriendthereisnoneedtoworryaboutit. Cleanupafteryourself.Oratleastkeepyourthingsonyourside.4Butbeingconsiderate考虑周到的withwhereyouputyourownstuff东西willhelpyouavoidthearguments. Askbeforeyoutake.Thisappliesto适用于foodclothesandanythingelsethatyoudon'town.5Evenifyoubothagreetoshareeverythingyoushouldstillask. A.Don'texpecttobebestfriends. B.Communicationisofvital至关重要的importance. C.Youdon'tneedtokeeptheroomcleanandorganizedallthetime. D.Roomscanbereallyeasyforamesstopileup. E.Ifyouwanttohaveagoodrelationshipwithyourroommateitallstartswithyou. F.Trytomakeyourroommatesyourbestfriends. G.Showyourroommatethatyouhaverespectforhisorherthings.
在△ABC中已知a=b=3B=则角C=.
有一款手机每部购买费用是5000元每年网络费和电话费共需1000元每部手机第一年不需锥修第二年推修费用为100元以后每一年的维修费用均比上一年增加100元.设该款手机每部使用x年共需维修费用fx元总费用gx元总费用一购买费用+网络费和电话费十维修费用 1求函数fxgx的表达式 2这款手机每部使用多少年时它的年平均费用最少
一个几何体的三视图如图所示则该几何体的体积为
A AtmyfirstclassintheForksHighSchoolMr.BannermyEnglishteachersentmetoanemptydeskatthebackwithout1introducemetotheclass.Itwasharderformynewclassmates2stareatmeinthebackbutsomehowtheymanaged.Ikeptmyeyesdownonthereadinglisttheteacherhadgivenme.Itwas3fairbasicBronteShakespeareChaucerFaulkner.I'dalreadyreadeverything.Thatwascomforting…andboring. B Yourteethmaybepartofyoursmile4theyhaveamoreimportantjob﹣theyrethefirststepintheprocessofdigestion.Youhavethree5kindofteeth.Intheveryfrontofyourmouthareeightflatthinteethcalledincisors.Theyareusedforcuttingandbitingfood.Nexttothesearepointedteethcalledcanines6alsohelpyoutearfood.Theremainingteetharemolars.Theseteethhaveflattopsforcrushingandgrindingthefood. C TheBeijingVanke﹣ShijinglongSkiResortislocated7YanqingDistrictanationaldemonstrationareaforecologicalconstruction.WithLongqingGorgetoitseastandGuantingReservoirtoitswestithasfreshairandan8impressenvironment.9buildin1999itwasthefirstlargeskiresorttobebuiltnearBeijing.In2016amassiverenovationproject10startbyVanketheBeijingBadalingTourismGeneralCompanyandtheoriginalBeijingShijinglongSkiResort.
△ABC中A=30°B=105°a=2则c=
已知某公司生产某款手机的年固定成本为400万元每生产1万部还需另投入160万元.设公司一年内共生产该款手机xx≥40万部且并全部销售完每万部的收入为Rx万元且. 1写出年利润W万元关于年产量x万部的函数关系式 2当年产量为多少万部时公司在该款手机的生产中所获得的利润最大并求出最大利润.
计算1﹣2sin215°的结果为
ThemusicwaswrittenbyAbingafolkmwhowasborninthecityWuxiin1893.
Tobehalotofpeopleattachgreatimportancetobecomingrichandfamous.
已知锐角α满足sin=则cosα=
Althoughitisoftencalledthekoalabearthislovelyanimalisnotactuallyabearatall.Itisamarsupial有袋目哺乳动物andlikekangaroosafemalekoalacarriesherbabyinherpouch育儿袋foraboutsixmonths. KoalasliveinfourstatesonlyineasternAustraliawheretheeucalyptustrees桉树theylovearemostplentiful.Infacttheyrarelyleavethesetreestheirsharpclawseasilykeepingthemhighupintheair. Duringthedaytheysleepforupto18hours.Whennotasleeptheyfeedoneucalyptusleavesespeciallyatnight.Koalasdonotdrinkmuchwaterandtheygetmostoftheirwaterfromtheseleaves.Eachanimaleatsalargeamountforitssize﹣abouttwoandahalfpoundsofleavesadayevenstoringsnacksofleavesinpouches. Thekoalabearswerewidelyhuntedduringthe1920sand1930sandtheirpopulationsdecreasedsuddenly.Helpedbyreintroductiontheyhavereappearedovermuchoftheirformerrangebuttheirpopulationsaresmaller.Koalasneedalotofspace﹣aboutahundredtreesperanimal﹣whichisapressingproblemasAustralia'swoodlandscontinuetogetsmallerbecausethetreestheyliveonarebeingcutdowntomakefarms.Alsoforestfirescausedbyheatwavesaredestroyingtheforeststhekoalaslivein. Ithasbeenestimated估算thatthereareonly100000koalasleftinthewildwiththelowestestimatesbeingnomorethan43000.ThekoalacanonlyeateucalyptusleavesandlivesnowhereelseexceptAustraliasoinordertosurvivehumaneffectonitslimitedenvironmentmustbecontrolledorthisattractivecreaturefacescertainextinction. 1Whyarekoalasindangerofdyingoutaccordingtothetext? A.Manyofthemdiedintheforestfire. B.Theycan'tbeusedtotheglobalwarming. C.Theirlivingenvironmentisgraduallybeingworsened. D.Farmersareburningtheeucalyptustreesthatkoalasliveon. 2Whathappenedduringthe1920sand1930s? A.Koalasfacedgreatdanger. B.Koalagotwellprotected. C.Koalas'populationfellslowly. D.Koalahadenoughspacetolivein. 3Whatwilltheauthormostprobablytalkaboutnext? A.Howtoincreasekoalas'population. B.Howtomakethebestofthelimitedenvironment. C.Howtohelpkoalasgetusedtothenewlivingenvironment. D.Howtoreducehumaneffectonkoalas'livingenvironment.
在四棱锥P﹣ABCD中底面ABCD是平行四边形PA⊥平面ABCD点MN分別为BCPA的中点且PA=AD=2AB=1AC=. 1证明MN∥平面PCD 2求直线MN与平面PAD所成角的余弦值.
热门题库
更多
高二上学期英语
高二上学期生物
高二下学期数学
高二上学期化学
高二下学期物理
高三下学期物理
高三上学期物理
高三上学期生物
高三上学期化学
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库