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若将函数f(x)=x6表示为f(x)=a0+a1(1+x)+a2(1+x)2+…+a6(1+x)6,其中a1,a2,…,a6为实数,则a3等于 .
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高二下学期数学《》真题及答案
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若将函数fx=x5表示为fx=a0+a11+x+a21+x2++a51+x5其中a0a1a2a5为实
已知定义在0+∞上的函数fx同时满足下列三个条件①f3=-1②对任意xy∈0+∞都有fxy=fx+f
若将函数fx=x5表示为fx=a0+a11+x+a21+x2++a51+x5其中a0a1a2a5为实
设函数fx=lg1-x2集合
={x|y=f(x)},
={y|y=f(x)},则图中阴影部分表示的集合为( )
A.[-1,0]B.(-1,0)
(-∞,-1)∪[0,1)
(-∞,-1]∪(0,1)
设奇函数fx在0+∞上是增函数且f1=0则不等式x[fx﹣f﹣x]<0的解集为
{x|﹣1<x<0,或>1}
{x|x<﹣1,或0<x<1}
{x|x<﹣1,或x>1}
{x|﹣1<x<0,或0<x<1}
函数fx的定义域为D.若对于任意x1x2∈D.当x1<x2时都有fx1≤fx2则称函数fx在D.上为
已知函数fx=2·sin.1求fx的最小正周期2若将fx的图象向右平移π/6个单位得到函数gx的图象
若将函数fx=x5表示为fx=a0+a11+x+a21+x2++a51+x5其中a0a1a2a5为实
若函数fxgx满足fx·gxdx=0则称fxgx为区间[-11]上的一组正交函数.给出三组函数①fx
0
1
2
3
函数fx是定义在R.上的奇函数下列说法①f0=0②若fx在[0+∞上有最小值为-1则fx在-∞0]上
1个
2个
3个
4个
已知x∈R符号[x]表示不超过x的最大整数若函数fx=x>0则给出以下四个结论①函数fx的值域为[0
观察式子x0=1x≠0x32=x6x-3=-x≠0其中成立的有
0个
1个
2个
3个
函数fx的定义域为D若对于任意x1x2∈D.当x1<x2时都有fx1≤fx2则称函数fx在D上为非减
设则.
f(x)为偶函数,值域为(-1,1)
f(x)为奇函数,值域为(-∞,0)
f(x)为奇函数,值域为(-1,1)
f(x)为奇函数,值域为(0,+∞)
已知函数fx=ax2+bx+1ab为常数x∈RF.x=1若f-1=0且函数fx的值域为[0+∞求F.
设fx是定义域为R.的偶函数且对任意实数x恒有fx+1=﹣fx已知x∈01时fx=1﹣x则函数fx在
是增函数,且f(x)<0
是增函数,且f(x)>0
是减函数,且f(x)<0
是减函数,且f(x)>0
已知函数fx=函数gx是周期为2的偶函数且当x∈[01]时gx=2x﹣1则函数F.x=fx﹣gx的零
8
7
6
5
对于求证函数fx=-x3在R.上是减函数用三段论可表示为大前提是对于定义域为D.的函数fx若对任意x
对于定义域为[01]的函数fx如果同时满足以下三条①对任意的x∈[01]总有fx≥0②f1=1③若x
已知函数fx为R.上的奇函数当x≧0时fx=xx+1.若fa=-6则实数a=____________
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10分Naturedoesnothurryyeteverythingisaccomplished. ﹣﹣﹣LaoTzu Ifyouareinacitywhereeveryonerushesrealizethatyoudon'thavetobelikeeveryoneelse.Youcanbedifferent.Youcanwalkinsteadofdrivinginrushhourtraffic.YoucanbeonyouriPhoneorBlackberrylessanddisconnectedsometimes.Yourenvironmentdoesn'tcontrolyourlife﹣﹣﹣youdo.I'mnotgoingtotellyouhowtogiveyouastep﹣by﹣stepguidetomovingslower.1 1.Doless. Cutbackonyourprojectsonyourtasklistonhowmuchyoutrytodoeachday.Focusnotonquantitybutonquality.2Savesmallerroutinetasksforlaterinthedaybutgiveyourselftimetofocus. 2.Havefewermeetings. 3Andtheyeatintoyourdayforcingyoutosqueezethethingsyoureallyneedtodointosmallwindowsandmakingyourush. 3.4 Whenyoudotheimportantthingswithfocuswithoutrushtherewillbethingsthatgetpushedbackandthatdon'tgetdone.Andyouneedtoaskyourself:hownecessaryarethesethingsWhatwouldhappenifIstoppeddoingthem 4.Practicemindfulness. Simplylearntoliveinthepresentratherthanthingssomuchaboutfutureorthepast.Whenyoueatfullyappreciateyourfood.Whenyouarewithsomeonebewiththemfully.Whenyouarewalkingappreciateyoursurroundingsnomatterwhereyouare. Trythesethingsout.Lifeisbetterwhenunrushed. 5 A.Starttoputofforcanceltheunnecessary. B.Meetingsareusuallyabigwasteoftime. C.Theworldlikelywon'tendifyoudon'tpassoneoftheexaminations. D.Butherearesomethingstoconsiderandperhapsadopt采纳iftheyworkforyourlife. E.Rememberthequote:ifnaturecangeteverythingdonewithoutrushingsocanyou. F.Pick2﹣3importantthings﹣﹣﹣orevenjustoneimportantthing﹣﹣﹣andworkonthosefirst. G.Giveyourselfmoretimetogetreadyandgetthere.
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如图所示倾角为θ=37°足够长的斜面体固定在水平地面上小木块在沿斜面向上的恒定外力F作用下从斜面上的A点由静止开始向上作匀加速运动前进了4.0m抵达B点时速度为8m/s.已知木块与斜面间的动摩擦因数μ=0.5木块质量m=1kg.g=10m/s2取sin37°=0.6cos37°=0.8. 1木块所受的加速度多大 2木块到外力F多大
7.5分Theanswertoprotectingandsavingmarine海洋wildlifecanstartwithcuttingbackonsomethingAmericansuseeveryday﹣plasticdrinkingstraws.ActorAdrienGrenierbestknownforplayingVincentChaseinthe2015movieEntouragelaunchedacampaigntoreducetheamountofsingle﹣useplasticusageinthiscountryinordertoprotectandsavemarinewildlifeandtheenvironment.Plasticdrinkingstrawsareamongmanymanysingle﹣useplasticproductscontributingtotheshockinglossofmarinelifebutthey'reagreatplacetostartbecausethey'resomethingAmericansareusingbythehundredsofmillionswithoutanyawarenessthatthey'resodamaging. AccordingtoEcocycleaninternationalenvironmentalorganizationAmericansusemorethan500millionstrawsdailywhichareenoughtofill127schoolbuseseachdayandtheycan'tberecycled.That meansplasticstrawsendupinlandfillsoroceanswherefishandothermarinewildlifemistakethesmallbitsforfoodandswallowthem.AfterseeingaphotoofawhalebeachedontheshorewithabellyfullofplasticGrenierfelttheinspirationtolaunchtheLonelyWhaleFoundationhopingtoinspireandeducateothersonthechallengesfacingmarinelife. AlongwithstoppingtheuseofstrawsGrenierhopestoeducateconsumersonthedangersofothersingle﹣useplasticitemssuchasgrocerybagsandwaterbottles.WhilemanyAmericansusetheseplasticproductsintheirdailylifetherearemoresustainablealternativesthatcanhelpprotecttheenvironmentEcocyclerecommendstheuseofstrawsmadefromstainlesssteelglassandevenbambooinsteadofplastic.Youcanbuyanumberoftheseenvironmentallyfriendlystrawsonlineandinstores. 1WhatistheprimarypurposeoftheLonelyWhaleFoundation A.Toadvocateagreenlifestyle. B.TopromoteGrenierslatestmovie. C.Toencouragepeopletoprotectoceanlife. D.Tosavepreciousnaturalresources. 2WhatcausedGreniertostarttheLonelyWhaleFoundation A.Apictureofadeadwhale. B.Plasticstrawsinlandfills. C.Theseveredamagedonetothesea. D.Thedisappearanceofsomespeciesunderthesea. 3Ecocycleadvisespeopletousestrawsthatare. A.easytorecycle B.harmlesstotheenvironment C.specialtomarinelife D.convenienttouse
6分Myson.ThephrasefeltdifficultandstrangethefirsttimeIsaiditandIhadtopracticeitathousandtimes.Istartedsayingthewordstomyselfthedaywhentheultrasound超声波toldmewewerehavingababy. Finallymysonwasborn. Thenursecameoutofthedeliveryroomholdingatinyhowlinghumanbeingwrappedinawhitesheethissmallhandsanddelicatefingersshakingnervously. BabySanchezsheaskedlookingattheroomfullofexpectantfathers. Istoodupholdingmybreath. Sheshowedmemybaby.MysonIwhispered.Thelittleguyscreamedwaaaaaaaaaah. ButinmyheartIheardhimcryoutDaaaaaaad!Idon'tcareifeveryoneintheroomwillsaytheydidn'thearmybabysaythat.IcalledhimMysonandhecalledmeDadandthat'sthat. PeopleaskmeWhatdidIfeelatthatmomentIcan'tevenbegintoanswer.I'mawriteryetItryhardtofindtherightwords.Joyfulisn'tpowerfulenough.Bliss狂喜isnotsweetenough.Peacefulisn'tcalmenough.Happyisn'ttenseenough. AftermysonwastakenawaytothenurseryIsatdownandshutmyeyes.Buttearsescapedthemaway.Thensuddenlymy80﹣year﹣oldfatherenteredandweembraced拥抱. DadIwhispered. Mysonmyheartheardhimsaying. Suddenlythepast33yearsfoldedintothepresentandIwasnowthebabybundledinwhitewithmyfatherstandingoverme. MysonIimaginedhimsaying. Daaaaaaaaaad!Icriedmylittlelungsout. AtthatpointIknewIwasgoingtobeagreatfather.Theoldmaninfrontofmeseemedtoagree.Hesmiledandwewalkedoutoftheroominsearchofthelittlehumanbeingthatwouldchangeourlivesforever. 1Theauthorcouldn'ttellhowhefeltatthemomentbecause. A.hewasawriter B.hewastooexcited C.hewastoonervous D.it'safeelingtoohardtoexpress 2WecanlearnthefollowingfromthepassageEXCEPTthat. A.theauthorgothisfirstbaby B.heprobablyhadalungdisease C.theauthordidn'treallyhearDaaaaadfromhisbaby D.thebabywouldchangetheauthor'slife 3Whywasthewritersurehewasgoingtobeagreatfather A.Becausehissonissogifted. B.Becausehehadmuchexperienceinbringingupchildren. C.Becausehisfatherpromisedtohelphim. D.Becausehisfatherhadalreadysethimagoodexample.
30分IwasshoppinginasupermarketlastnightwhenIsawahomelesswomanwithatrolley手推车fullofallherthings.Shewassittinginsidetokeep1.Iwentuptoherandtriedtogiveher2forsomethingtoeat.Shewouldn't3it.IsaidIwantedtohelpher4shesaidthatifenoughmoneywasgiventoherthatdayandshehadmoneyonherotherhomelesspeoplewould5itfromherwhilesheslept. I6thatIwantedtohelpherandaskedifIcouldbuyhersomethingwarm.7shesaidno.Shethankedmeandsaidhow8shewasthatIhadspokentoherandoffered9.WeintroducedourselvesandshesaidthatwhenIsawherthenexttimeshewould10accepthelp. Iwalkedoutintothecoldwinter11andgavethemoneytoahomelessmanwhowasfreezing.Iaskedhimhisname12IalwayswanttoknowandItoldhimmine.HappearedtohavehadadrinkingordrugproblembutIwas13thatheacceptedmyhelp. Ihadthis14thatstayedwithme.IfeltthatIhadbeeninthepresenceofsomeonereallyspecialearlier.Ialways15whatitwouldbeliketobeinahomelessperson'sshoesIknowhow16IamandhowgratefulIamforwhatI17inmylife. Ilearnedavaluable18fromtheladyImet:Notall19peoplewilltakemoneyorhelpiftheyfeelenoughhasbeengiventothemthatday.Shewasgratefulfortheday.IwillmakesureI20heragain. 1Acalm B.warm C.healthy D.energetic 2A.time B.freedom C.money D.choice 3A.take B.make C.eat D.receive 4A.and B.or C.so D.but 5A.spend B.steal C.find D.hide 6A.agreed B.wondered C.apologized D.explained 7A.Again B.Besides C.Instead D.Thus 8A.proud B.curious C.regretful D.grateful 9A.help B.food C.strength D.advice 10A.generously B.willingly C.slightly D.politely 11A.morning B.noon C.afternoon D.night 12A.unless B.when C.because D.though 13A.glad B.sure C.astonished D.puzzled 14A.hope B.feeling C.belief D.courage 15A.expect B.believe C.imagine D.remember 16A.lucky B.unique C.serious D.confident 17A.observe B.own C.support D.respect 18A.fact B.quality C.lesson D.subject 19A.lonely B.hungry C.helpless D.homeless 20A.call B.ask C.meet D.follow
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