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已知函数f(x)及其导数f'(x),若存在x0使得f(x0)=f'(x0),则称x0是f(x)的一个“巧值点”.给出下列五个函数:①f(x)=x2,②f(x)=e﹣x,③f(x)=lnx,④f(x)...
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高三下学期数学《》真题及答案
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设f′x0=f″x0=0f′″x0〉0则下列结论正确的是
若x0为f(x)的极值点,则必有f'(x0)=0
若f'(x)=0,则点x0必为f(x)的极值点
若f'(x0)≠0,则点x0必定不为f(x)的极值点
若f(x)在点x0处可导,且点x0为f(x)的极值点,则必有f'(x0)=0
函数y=fx在点x=x0处取得极小值则必有
f′(x0)=0
f″(x0)>0
f′(x0)=0且f″(x0)>0
f′(x0)=0或导数不存在
若y=fx为定义在D.上的函数则存在x0∈D.使得[f-x0]2≠[fx0]2是函数y=fx为非奇非
已知函数fx的定义域为R且对任意的实数x导函数f′x满足0 1若对任意的闭区间[ab]R
已知函数fx=当x=时函数fx有极大值.1求实数bc的值2若存在x0∈[-12]使得fx0≥3a-7
设函数y=2sin的图象关于点Px00成中心对称若x0∈则x0=________.
已知函数在x0处可导且{x/[fx0-2x-fx0]}=1/4则f′x0的值为
4
-4
-2
2
函数y=fx在x=x0处取得极小值则必有
f'(x0)=0
f'(x0)>0
f'(x0)=0且f"(x0)>0
f'(x0)=0或导数不存在
已知函数在区间[24]上任取一点x0使得f’x0>0的概率为.
若二次函数fx=ax2+bx+ca≠0的图象和直线y=x无交点现有下列结论:①方程ffx=x一定没有
设函数fx=x-13-ax-bx∈R其中ab∈R I求fx的单调区间 II若fx存在极点x0且fx
已知函数fx=elnxgx=lnx-x-1hx=x2.1求函数gx的极大值;2求证:存在x0∈1+∞
设函数fx的定义域为R.x0x0≠0是fx的极大值点以下结论一定正确的是
∀x∈R.,f(x)≤f(x0)
-x0是f(-x)的极小值点
-x0是-f(x)的极小值点
-x0是-f(-x)的极小值点
已知limΔx→0fx0+2Δx-fx03Δx=1则导数f′x0等于
-1
3
23
32
已知limΔx→0fx0+2Δx-fx03Δx=1则导数f′x0等于
设函数fx=x3-ax-bx∈R其中ab∈R Ⅰ求fx的单调区间 Ⅱ若fx存在极值点x0且fx1=
若函数fx在点x0间断gx在点x0连续则fzgx在点x0
间断
连续
第一类间断
可能间断可能连续
已知函数fx在x=x0处的导数f′x0=4则极限limΔx→0fx0+2Δx-fx03Δx的值等于
4
38
83
对于定义域在R.上的函数fx若实数x0满足fx0=x0则称x0是函数fx的一个不动点.若函数fx=x
已知函数fx=x3+ax2+bx+c下列结论中错误的是
)
(
)函数y=f(x)的图像是中心对称图形 (
)若x0是f(x)的极小值点,则f(x)在区间(-∞,x0)单调递减 (
)若x0是f(x)的极值点,则f’( x0)=0
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8分Theseallyingontopoftheicedoesn'tstandachance.Knockedintotheseathesealbecomesamealforoneoftheoceanstophunters﹣thehugeorcaorkillerwhale. Orcashuntalmosteverythingfromfishtosealssealionspenguinssharksandevenotherkindsofwhales.Dependingontheseasonandwheretheyaretheirdietvaries﹣someorcaseatmorefishesthansealsandpenguins.Butwherevertheyareinanyoftheworld'soceansaverage﹣sizedorcasmayeatabout500poundsoffoodaday.Orcashavemanyhuntingtechniquesandstrikingsealsofficeisjustoneofthem. Oftenreferredtoaswolvesoftheseaorcasliveandhunttogetherinfamilygroupsmuchlikeapackofwolves.Groupsoforcasworktogethertodrivefishintoacompactareasothatthey'reeasiertoeat.Theywillalsohittheirtailsontothewater'ssurfacecausingawavetowashpenguinsorsealionsintothewater. Orcas'teethnumberingabout45andeachmeasuringabout3incheslongareshapedfortearingprey猎物Orcasdonotchewtheirfood.Theycanswallowsmallsealsandsealionswhole.Thepreyslidesdowntheorcas'throats!Thecolorpatternoforcasmayhelpthemat﹣tacktheirprey.Theirbacksareblackbuttheirstomachsarewhite.Animalslookingdownonanorcafromabovesuchasasealonicemightnotseeitbecausethewhale'sdarkbackblendswiththewaterbelow. Ontheotherhandthewhale'swhiteundersidecombineswiththelightstreamingdownintotheseafromthesurfacemakingithardtospotfrombelow.Withorcascamouflagedsowellthosepreyfishpenguinsorsealsarelikelytomissthedangerheadingtheirwayasthekillerwhaleonceagainprovesitistheoceans'superblydesignedhunter. 28.Accordingtothetextweknoworcasare. A.goodatusingtheirteeth B.themostcruelhuntersintheworld C.bigwhaleswhodon'thuntotherwhales D.skillfulhunterswholikehuntingmanycreatures 29.Whichwordcanbeusedmostprobablytodescribeorcaswhentheyarehunting? A.Cooperative B.Incompetent. C.Swift. D.Careful. 30.WhatisthemainideaofParagraph4? A.Thereasonswhyorcashuntseals. B.Theenvironmentwhereorcaslive. C.Thefeaturesofwhatorcaslooklike. D.Thewaysofhoworcashuntanimals. 31.WhatdoestheunderlinedwordblendsinParagruph4mean? A.Meets. B.Mixes. C.Struggles. D.Equips.
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1分Thereisnosimpleanswertosuchaquestion.isoftenthecaseinsaid. A.one B.that C.as D.what
1分Therearecertainhistoricoccasionsarelikelytoremindpeopleofwhathappenedinthepastandsetpeoplereflectingonthem. A.when B.that C.where D.what
10分根据短文内容从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项. Manypeoplecomplainaboutnothavingenoughtimetoexercise.Ithinktheyarelyingtothemselves.Therealproblemisthattheyhateexercising.36GoingtothegymseemeddullandpainfulcomparedtomostotherwaysIcouldspendmytime.ButbynotgivingupandlookingforawayIcouldenjoyworkingoutIchangedthispattern.Herearesometipstomakeexercisesomethingyouactuallywanttodo 37Removethethinkingelement.Ifyoucanmakeexerciseahabitthenitbecomesthatmucheasiertogo. Getapartner.38Picksomeonewhocaresabouttheirhealth.Notonlycanyousocial﹣izewithsomeonewhileyou'retherebutyou'llhaveabackupincaseyourmotivationaloneisn'tenoughtodragyourselfoutthere. Experiment.Don'tstickwiththesameroutine.39Therearemanydifferentexerciseroutinesyoucanfolloworactivitiestotry.Ifyoudon'tlikeliftingweightsyoucantryrunningordancing. Maketime.Youcan'tsayyoudon'thavetimetoexercise.Exerciseimprovesyourenergylevelsandmoodwhichmakesyoumoreproductivethananytimelout.40Getupabitearlierandgointhemorning.Orscheduleitrightafterworkbeforeyousettledownfortheday.Onceyoumakelimeandmakeitahabityou'llactuallywanttoexerciseinsteadofjustfeelingyoushould. A.Makeitahabit. B.Recordimprovements C.Iusedtohateexercisingtoo. D.Mixitupandtrydifferentactivities. E.Herearetwobadwaystostartexercising. F.Getsomeoneelsetogotothegymwithyou. G.Findyourfortyminutessomewhereinthedayandmakeitarule.
1分It'snecessarythatnotonlytoseeadoctorbutalsohaveagoodrest. A.willBoygo B.Bobwillgo C.shouldBobgo D.Bobshouldgo
1分It'soverthreeyearssincethereleaseofanimationFrozenbuttheicyqueenandherfrozenempirearestillstayingputinthespotlightasifthemovieonlylastmonth. A.werereleased B.hadbeenreleased C.wouldhavebeenreleased D.wasreleased.
Europeansshouldtrytostayindoorsifashfromlceland'svolcanostartssettlingtheWorldHealthOrganizationwarnedFridayassmallamountsfellinIcelandScotlandandNorway. WHOspokesmanDanielEpsteinsaidthemicroscopic微小的ashispotentiallydangerousforpeoplewhenitstartstoreachtheEarthbecauseinhaled吸入particlescanenterthelungsandcauserespiratoryproblems.AndhealsosaidEuropeanswhogooutsidemightwanttoconsiderwearingamask. Otherexpertshoweverweren'tconvincedthevolcanicashwouldhaveamajoreffectonpeoples'healthandsaidWHO'swarningswerehysterical.Theysaidvolcanicashwasmuchlessdangerousthancigarettesmokeorpollution.Volcanicashismadeoffineparticlesoffragmentedvolcanicrock.Itislightgraytoblackandcanbeasfineastalcumpowder.Duringavolcaniceruptiontheashcanbebreatheddeepintothelungsandcauseirritationeveninhealthypeople.Butonceitfallsfromagreaterdistance﹣likefromthecloudcurrentlyhoveringaboveEurope﹣itshealtheffectsareoftenminimalexpertssay. NotallparticlesarecreatedequalsaidKenDonaldsonaprofessorattheUniversityofEdinburghInthegreatschemeofthingsvolcanicashisnotallthatharmful.AndhesaidmostEuropeans'exposuretovolcanicashwouldbeignoredandthatonlythoseintheneardistrictsoftheIcelandicvolcanowouldlikelybeatrisk. Dr.StephenSpiroaprofessorofrespiratorymedicineanddeputychairoftheBritishLungFoundationsaidthefurthertheparticlestravelthelessdangeroustheywillbe.ThecloudhasalreadypassedovernorthernScotlandandwehaven'theardofanyilleffectstherehesaid.Spirosaidtowearmasksorstayindoorstoavoidvolcanicashwasoverthetopandabithysterical. 1Thetextismainlyabout. A.theeffectofvolcanicash B.thehealthriskofvolcanicash C.thedisadvantagesofvolcanicash D.theopinionsonhealthriskofvolcanicash 2WhichoneistrueaccordingtoParagraph3? A.Thevolcanicash'seffectsonEuropeanswerelittle. B.Theashcausedirritationeveninhealthypeople. C.OtherexpertsthoughtWTO'Swarningswereuseful. D.Thevolcanicashwasmoredangerousthancigarettesmokeorpollution. 3TheunderlinedwordhystericalinParagraph4mostprobablymeans. A.amazing B.practical C.valuable D.overstated 4Whatcanwelearnfromparagraph? A.Thevolcanicashwouldn'tbeharmfultopeople. B.Allexpertsthoughtthevolcanicashdidgreatharmtoourhealth. C.Peopleclosetothevolcanowouldlikelybeatriskaccordingtosomeexperts. D.EuropeansshouldstayindoorsbecauseIceland'svolcanostartssettling.
Weallknowofcoursethatresultsarethecauseofaction.Buthowdoyou1thehabitoftakingaction?Inorder2ustosuccessfullyimplementthehabitoftakingactionwehavetolearnhowtouseourimaginationandindependentwilltoovercomeour3. Wehavea4endowmentashumansweareresponsible.Whenwetakea5lookatthewordresponsibilitywefinditsrootscomefromthetwowordsresponseandability.Wehavetheabilitytorespond6theabilitytotakeaction. Whenwemakethe7ofbecomingresponse﹣ableweacceptthatour8aretheproductofourchoices.Thechoicetotakeactionornotwillultimatelydetermineyourresults.Ifyouwantresultsinlifeyoumust9thehabitoftakingconsistentaction. Thereasonmostpeopledon'ttakeactionisbecausetheythinktheyareaproductoftheir10.Thisisaclassiccaseofdeterminismandadistortedviewofreality.Thisthinkinggetsusnowhereasitleavesourfate11ourcontrol.Ifourcircumstancesarebeyondourcontrolnaturallywe'll12motivationtotakeaction.What'sthepointwhenwe'reaproductofourenvironment? Thismayseemlikeano﹣brainerbutmostpeoplegoforexactlytheopposite.Theygoforsecuritysafetyandcomfort.Theyspendmoretime13outerresourcesthendevelopinginnerones. Ifyou'regoingtodevelopthehabitoftakingactionyouneedtobemotivated.Ifyou'redoingwhatyoulovetodoeverydayyou'relikelytotake14andmassiveaction.Ifyou'reworkinginajobyou15slavingyourselfawayinacubicleyou'relesslikelytotakeaction.You'rejustgoingtodothebareminimumtogetby. Todevelopthehabitofactionweneedtomake16thatinspireus.Whenwe'reinspiredwe'llbemotivatedandthe17resultisthatwe'lltakelotsandlotsofaction. Findawaytostartdoing18youloveevenifyouhavetostartsmall.You'remorelikelytodevelopyourtalentsinsomethingyouloveratherthansomethingthatgivesyoua19senseofsecurity.Ifyoufeellikeyoudon'thaveenoughtime20makingtimefortheimportant.Ifwedon'tmaketimeforthethingsthatreallymattertouswhenwillwe?Whowantstogofromthecubicletothecasket? 1A.take B.have C.make D.develop 2A.of B.to C.for D.at 3A.shortcoming B.conditioning C.doing D.working 4A.unique B.only C.one D.kind 5A.better B.closer C.near D.good 6A.or B.and C.but D.so 7A.chance B.action C.decision D.determination 8A.lives B.fates C.futures D.character 9A.catch B.master C.grasp D.understand 10A.parents B.surroundings C.environment D.God's 11A.under B.without C.beyond D.within 12A.much B.many C.lack D.plenty 13A.getting B.making C.gain D.acquiring 14A.frequent B.continue C.consistent D.often 15A.enjoy B.like C.love D.hate 16A.ideal B.goals C.dreams D.ambitions 17A.natural B.general C.total D.unexpected 18A.that B.where C.how D.what 19A.false B.mistake C.strength D.weakness 20A.guess B.consider C.plan D.advise
1分Icansharewithherourtravellingexperiencestakingcareofpetsorwehaveincommon. A.whatever B.whichever C.nomatterwhat D.nomatterwhich
1分StudentsarenotrequiredtotaketheTOEELortheIELTStestbutwewelcomethesubmissionofyourscoreifyouhavetaken. A.both B.none C.either D.neither
1分﹣Heytheboywithabluebackpackcomeoverhere?Weneedanotherhandwiththistable. ﹣Me?OhsorrybutI'vegotaninjuryinmyleg. A.shall B.would C.should D.must
1分IwasonceashamedtoadmitmyweaknessbutnowIhavenosuchfeelingandImyselfmuchdiscomfort. A.grant B.dismiss C.save D.rid
1分Ourclassheldafierceastowhethertoreducetheamountofhomeworkornot. A.bargain B.competition C.debate D.campaign
10分Ifyouhaveadaughtertakethetimetoreadthis.Itcouldsaveheralotofheartache.Nottomentionstomachachesheadachesmisseddaysofschoollowergradeseatingissuesanddepression. Thesadtruthisthateveryschoolwhetherpublicorprivatehasmeangirls.Ibetyoucanstillevenrememberwhotheyarefromyourschool.AsaschoolconsultantandmotherofthreedaughtersIknowfirsthandbothpersonallyandprofessionallyhowmuchithurtswhengirlsaretargetedbybullies恃强凌弱者. Theoldsayingsticksandstonesmaybreakmybonesbutwordswillneverhurtmecouldn'tbefurtherfromthetruth.Whileboysusuallybullythroughintimidation胁迫girlsbullythroughexclusionalsocalledrelationalaggression.Here'sanexampleofacaseofrelationalbullyingtakenfrommyexperienceasaschoolconsultant HeatherwasmiserablebecauseagirlinherclassLesliewasnotonlysayingmeanthingstoherfacebutgettingtheothergirlsintheclasstoexcludeherwiththeageoldlineYoucan'tbefriendswithmeifyou'refriendswithher.InoursessionsHeatherwouldcomplainthatshedidn'thaveanyonetoplaywithbecausegirlswereafraidthatiftheyhungaroundherthey'dbecomeLeslie'snexttarget. InordertoimprovethesituationIhadtonotonlyreducethepowerLesliehadbutempowerHeatheraswell.Herearesomeideasthathelpedadaptedforusebyparents Askforspecificswhenyourdaughtermentionsbullying.Who?Where?How? Telltheprincipalandclassroomteacherthespecificsofhowsheisbeingbullied.Havethemtellotherteachersi.e.gymartmusichallwaymonitorsandcafeteriastaffsothateveryonewhocomesincontactwithhercanbeonthelookoutandreadytointerfere. Explaintoherthatreportinganincidentisnotthesameastattling打小报告andhavehertellanadultatschoolwhensheisbeingbullied. Teachhertoconveyself﹣confidencebywalkingconfidentlywithherheadup.Bulliestargetthosetheythinkareweaker. Arrangeopportunitiesforyourdaughtertosocializewithherfriendsoutsideofschooltohelphermaintainastrongsocialsupportsystem. InHeather'scasethesestepsrelievedtheproblem.Butbecauseit'stoughertocatchgirlbulliesit'sextremelyimportantforgirlstotellanadultiftheyarebeingbullied.Unlikeboyswhousuallybullyphysicallymeangirlsoftenspreadrumorswhisperastheirtargetwalksbytalkloudlyaboutapartyshewasn'tinvitedtogiveherthesilenttreatmentandasdiscussedabovetellothersnottobefriendswithher.Schoolpersonnelaretheretohelpbutinordertodoanythingtheymustknowaproblemexists!
12分JobsquicklybecameboredwithcollegeHelikedbeingatReedjustnottakingIherequiredclasses.Infacthewassurprisedwhenhefoundoutthattherewerestrictcourserequirements.WhenWozniakcametovisit.Jobswavedhisscheduleathimandcomplained.Theyaremakingmetakeallthesecoyrses.WozniakrepliedYesthat'swhattheydoincollegeJobsrefusedtogototheclasseshewasassignedandinsteadwenttotheoneshewantedsuchasadanceclasswherehecouldenjoyboththecreativityaridthechancetomeetgirls.Iwouldneverhaverefusedtotakethecoursesyouweresupposedtothat'sadifferenceinourpersonality.saidWozniaksurprisedlyandadmiringly. Jobsalsobegantofedguiltyaboutspendingsomuchofhisparents'moneyonaneducationthatdidnotseemworthwhile.Allofmyworking﹣classparents'savingswerebeingspentonmycollegetuition学费.hedetailedhisexperienceinafamousceremonyaddressatStanford.IhadnoideawhatIwantedtodowithmylifeandnoideahowcollegewasgoingtohelpmefigureitout.AndhereIwasspendingallofthemoneymyparentshadsavedtheirentirelife.SoIdecidedtodropoutandtrustthatitwouldallworkoutokay. Hedidn'tactuallywanttoleaveReedhejustwantedtoquitpayingtuitionandtakingclassesthatdidn'tinteresthim.SurprisinglyReedtoleratedthat.Hehadaveryinquiringmindthatwasenormouslyattractivesaidthedeanofstudents.JackDudman.Herefusedtoacceptautomaticallyreceivedtruthsandhewantedtoexamineeverythinghimself.DudmanallowedJobstoauditclassesandstaywithfriendsinthedormsevenafterhestoppedpayingtuition. TheminuteIdroppedoutIcouldstoptakingtherequiredclassesthatdidn'tinterestmeandbegindroppinginontheonesthatlookedinteresting.hesaid.Amongthemwasacalligraphy书法classthatappealedtohimafterhesawpostersoncampusthatwerebeautifullydrawn.Ilearnedaboutserifandsansseriftypefaces字体aboutvaryingtheamountofspacebetweendifferentlettercombinationsaboutwhatmakesgreattypographygreat.Itwasbeautifulhistoricalartisticallyfineinawaythatsciencecan'tcaptureandIfounditfascinating. ItwasyetanotherexampleofJobsconsciouslypositioninghimselfattheintersection相交点oftheartsandtechnology.Inallofhisproductstechnologywouldbemarriedtogreatdesignelegancehumantouches﹣andevenromance.*MfIhadneverdroppedinonthatsinglecourseincollegetheMacwouldhaveneverhadsomanytypefaces.AndsinceWindowsjustcopiedtheMacit'slikelythatnopersonalcomputerwouldhavethem. MeanwhileJobshadahardtimeatReed.HewentbarefootmostofIhetimewearingsandalswhenitsnowed.ElizabethHolmesmademealsforhimtryingtokeepupwithhisobsessivediets.HereturnedsodabottlesforsparechangecontinuedhislonghardjourneystothefreeSundaydinnersattheflareKrishnatempleandworeadownjacketintheheatlessgarageapartmentherentedfor$20amonth.Whenheneededmoneyhefoundworkatthepsychologydepartmentlabmaintainingtheelectronicequipmentthatwasusedforanimalbehaviourexperiments.OccasionallyChrisannBrennanwouldconictovisit.Theirrelationshipdevelopedabnormally.Butmostlyhetendedtothebeginningofhisownsoulandpersonalgoalforenlightenment开明. IcameofageatamagicaltimehereflectedlaterOurconsciousnesswasraisedbyZenandalsobyLSDEvenlaterinlifehewouldcreditcertaindrugsformakinghimmoreenlightened.TakingLSDwasavaluableexperienceoneofthemostimportantthingsinmylife.LSDshowsyouthatchoresanothersidetothecoinandyoucan'trememberitwhenitwearsoff.butyouknowit.Itheightenedmysenseofwhatwasimportant﹣creatingwonderfulthingsinsteadofmakingmoneyputtingthingsbackintothestreamofhistoryandofhumanconsciousnessasmuchasIcould. 65.JobsandWozniakdifferedin. A.approachtofreedom B.appetiteforknowledge C.attitudetorequirements D.affectionforcollegelife 66.OnefactorinJobs1decisiontoleavecollegeisthat. A.hisfamilywasinabsolutepoverty B.hewantedtobeindependentofhisparents C.hewouldn'thavehisparents'moneywasted D.thecollegecouldn'tpreparehimforhissetgoal 67.FromJackDudman'sstatementweamseethatJobswas. A.ratherdifficulttogetalongwith B.quitegoodatsolvingproblems C.toostubborntochangehismind D.veryseriousaboutexistingbeliefs 68.TheunderlinedwordauditinParagraph3means. A.attendinformally B.missoccasionally C.givesuccessfully D.conductirregularly 69.Jobsworkedontypefaceswhilesufferingfromahardlife. A.toprovehisvaluetothewholeworld B.tobringsomethinggreatintoexistence C.tomakehimselfwealthyforabetterlife D.toshowcollegewasunimportanttohim 70.Whichofthefollowingcanbethepropertitleforthepassage? A.StayOut B.DropOut C.HoldOut D.WorkOut.
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