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设函数f(x)=(2x2-ex)cos(2x+)(e为自然对数的底数)的导函数为f′(x),则f′(0)= .
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高二下学期数学《》真题及答案
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函数y=cos2x﹣1的导数为
y'=﹣2sin(2x﹣1)
y'=﹣2cos(2x﹣1)
y'=﹣sin(2x﹣1)
y'=﹣cos(2x﹣1)
设函数fx=sinx-cosx若0≤x≤2017π则函数fx的各极值之和为.
设函数y=e2xcos3x则dy=
e
2x
(2cos3x-3sin3x)
e
2x
(2cos3x-3sin3x)dx
-6e
2x
sin3xdx
e
2x
(2cos3x+3sin3x)dx
设函数fx=x3+a-1x2+ax若fx为奇函数则曲线y=fx在点00处的切线方程为
y=-2x
y=-x
y=x
y=2x
设函数fx=cos2x﹣﹣2sinxcosx.Ⅰ求fx的最小正周期并指出由fx的图象如何变换得到函数
函数fx=2cos2x+sin2x的最小值是________.
设fx的一个原函数为cosxgx的一个原函数为x2则f[gx]等于
cosx
2
-sinx
2
cos2x
-sin2x
设函数fx=2x2-excos2x+e为自然对数的底数的导函数为f′x则f′0=.
已知向量a=mcos2xb=sin2xn设函数fx=a·b且y=fx的图象过点和点.1求实数mn的值
设fx表示-x+6和-2x2+4x+6的较小者则函数fx的最大值为_________
设函数fx=kax-a-xa>0且a≠1是定义域为R.的奇函数.⑴若f1>0试求不等式fx2+2x+
设fx是周期为2的奇函数当0≤x≤1时fx=2x1-x则 =
函数fx=2cos2x+sin2x的最小值是________.
已知函数fx=sinx+cosxx∈R..1求的值2试写出一个函数gx使得gxfx=cos2x并求g
已知函数fx=e2x-axa∈R.e为自然对数的底数.1讨论函数fx的单调性2若a=1函数gx=x-
已知函数fx=sin2x+cos2x−.1求y=fx图象的距原点最近的对称中心的坐标;2设gx=si
将函数y=sin2x+cos2x的图象向左平移个单位长度所得图象对应的函数解析式可以是.
y=cos 2x+sin 2x
y=cos 2x-sin 2x
y=sin 2x-cos 2x
y=sin xcos x
函数y=x2cos2x的导数为
y′=2xcos 2x-x
2
sin 2x
y′=2xcos 2x-2x
2
sin 2x
y′=x
2
cos 2x-2xsin 2x
y′=2xcos 2x+2x
2
sin 2x
设a为实数函数fx=2x2+x﹣a|x﹣a|Ⅰ若f0≥1求a的取值范围Ⅱ求fx在[﹣22]上的最小值
函数y=fx的图象向右平移单位后与函数y=sin2x的图象重合则y=fx的解析式是
f(x)=cos(2x﹣
)
f(x)=cos(2x+
)
f(x)=cos(2x﹣
)
f(x)=cos(2x+
)
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假设你是晨光中学学生李津你的美国朋友Chris从某网站得知中国外交部在4月16日为天津举办了主题为新时代的中国:活力天津走向世界全球推介活动希望你能介绍相关情况.为了让Chris更好的了解天津请根据以下提示给他写一封电子邮件. 1简单介绍外交部天津全球推介活动引起的反响; 2介绍天津风景名胜和丰富多彩的历史文化; 3希望他有机会来访天津. 参考词汇:中国外交部MFA DearChris Yours LiJin
ItwasrainyandIhadnodesiretodriveupthewindingmountainroadtomydaughterCarolyn'shouse.ButshehadinsistedthatIcometoseesomethingatthetopofthemountain. SohereIwasreluctantlymakingthetwo﹣hourjourneythroughfogthathunglikeveils.BythetimeIsawhowthickitwasnearthesummitI'dgonetoofartoturnback. NothingcouldbeworththisIthoughtasIinchedalongthedangeroushighway. I'llstayforlunchbutI'mheadingbackdownassoonasthefogliftsIannouncedwhenIarrived. ButIneedyoutodrivemetothegaragetopickupmycarCarolynsaidCouldweatleastdothat? Howfarisit?Iasked. AboutthreeminutesshesaidI'lldrive﹣I'musedtoit. AftertenminutesonthemountainroadIlookedatheranxiously.Ithoughtyousaidthreeminutes. Shegrinned.Thisisadetour. Turningdownanarrowtrackweparkedthecarandgotout.Wewalkedalongapaththatwasthickwitholdpineneedles.Hugeblack﹣greenevergreenstoweredoverus.Graduallythepeaceandsilenceoftheplacebegantofillmymind. Thenweturnedacomerandstopped﹣andIgaspedinamazement. Fromthetopofthemountainslopingforseveralacresacrossthemountainsideandvalleyswereriversofflowersinnumerouscolors.Itlookedasthoughthesunhadtippedoverandspilledgolddownthemountainside. Aseriesofquestionsfilledmymind.Whocreatedsuchbeauty?Why?How? Asweapproachedthehomethatstoodinthecenterofthepropertywesawasignthatread:AnswerstotheQuestionsIKnowYouAreAsking. Thefirstanswerwas:OneWoman﹣TwoHandsTwoFeetandVeryLittleBrain.Thesecondwas:OneataTime.Thethird:Startedin1958. AswedrovehomeIwassomovedbywhatwehadseen.Icouldscarcelyspeak.Shechangedtheworld.Ifinallysaidonebulb球茎atatime.Shestartedalmost40yearsagoprobablyjustthebeginningofanideabutshekeptatit. Thewonderofitwouldnotletmego.ImagineIsaidifI'dhadavisionandworkedatitjustalittlebiteverydaywhatmightIhaveaccomplished? Carolynlookedatmesidewayssmiling.Starttomorrowshesaid.Betteryetstarttoday. 1Whatwastheweatherlikewhentheauthordrovetovisitherdaughter? A.Itwassnowing. B.Itwasfoggy. C.Itwasfreezing. D.Itwassunny. 2Whatcanbeinferredaboutthedaughter? A.Shetoldawhitelietohermother. B.Shewasanexperienceddriver. C.Shedidn'tknowthewayverywell. D.Shekneweverythingaboutthewoman. 3Themotherbegantoenjoyherselfwhen. A.theyweredrivinginthecar B.theywereatthegarage C.theywereontheirwayback D.theywerewalkinginthewoods 4Whichofthefollowingcanbestdescribetheowneroftheproperty? A.Crazyandsilly. B.Determinedandpersistent. C.Braveandcareful. D.Beautifulandcourageous. 5Whatdoyouthinkthemotherwilldoafterthisvisit? A.Shewilllookafterhergrandchildren. B.Shewillpayasecondvisittothegarden. C.Shewillbegintodosomethingmeaningful. D.Shewillcomeandlivewithherdaughter.
Georgeleftwordwithmysecretaryhewouldcallagainintheafternoon.A.that B.who C.as D.which
Itisnotsurprisingthatshewaselectedmonitor;sheisverysmartgirlwhohastheabilitytoorganizetheclasswell.A./;the B./;a C.a;a D.the;/
FengXiaogang'slatestfilmYouthnowaboxofficehitscheduledforreleaseonSept29washeldbackfortwomonths.A.casually B.originally C.temporarily D.eventually
AsateenagerdreamingofawritingcareerIwasinspiredtodiscoverthattwoofmyfavoritemovieswerebothwrittenbyafemaleteam:KirstenandherwritingpartnerKaren. Ididn'tthinkthey'dtakeayoungwriterlikeme1.ButstillIwroteKirstenanemaillettingherknowthatIhadanideaIwantedto2withherandKarenandaskedifthey'dbe3tomeetwithme. Ididn'tevenexpectaan4tomyemail.However12daysafterIsentitIreceivedaan5replyfromKirsten. Heremailincludedthislinewhichmademe6upfrommycomputerchair:KarenandIwouldbehonoredto7youandtohearmoreabouteverythingyou'reworkingon.Wemetfor8thefollowingweekandafterathree﹣hourmeal9laughsandsisterlyadviceafriendshipwasborn. 10KirstenandKaren11theideaIsharedwiththem. Their12inmyideasattheearlieststageofmycareerissomethingI'llneverforget;it'swhatmademebelievethatIcouldbeagood13toojustlikethem.Andmoreimportantlyour14isstillgoingstrongalltheseyearslater. InfactKirstenisthefirstpersonwhoeversuggestedI15anovel.Actuallyshegavemethis16whilewewerestandingontheTeenssectionofBarnes&Nobleabookstorewhereseveralyearslaterour17wouldsittogetherontheshelves. IwisheveryyoungwriterhadsomeonelikeKirstenintheirlifetohelp18themontheirway.AsIlookedatourbookshangingouttogetheronthebookstoreshelfIonceagainthoughhowgladIwasthatIsentthat19yearsago. Ifyoutoohaveanidolwhoyouwouldlovetolearnfromsimply20outandaskthem.Thatmightbeallittakestosetyouonthepathtoyourdreams. 1A.proudly B.seriously C.surprisingly D.kindly 2A.share B.work C.experiment D.compare 3A.ready B.hesitant C.willing D.satisfied 4A.introduction B.comment C.suggestion D.response 5A.accurate B.reliable C.convincing D.warm 6A.jump B.throw C.turn D.look 7A.call B.visit C.meet D.teach 8A.training B.fun C.business D.dinner 9A.replacedby B.filledwith C.involvedin D.basedon 10A.Amazingly B.Certainly C.Ridiculously D.Naturally 11A.criticized B.doubted C.understood D.loved 12A.improvement B.practice C.belief D.pride 13A.actress B.writer C.director D.judge 14A.friendship B.confidence C.difficulty D.pressure 15A.write B.read C.buy D.lend 16A.present B.chance C.advice D.task 17A.books B.friends C.goods D.photos 18A.remind B.comfort C.challenge D.guide 19A.question B.paper C.email D.novel 20A.watch B.reach C.drop D.stretch
Youhavetorewritethemonthlyreportbecauseyoumanyimportantdetails.A.turnedoff B.leftout C.droppedby D.putup
25分假设你是遂宁某中学高三学生李华你的美国朋友Jim想了解你校学生课外阅读情况.请你回一封邮件内容包括: 1.你校学生课外阅读现状; 2.原因分析 3.你的看法. 注意:1.词数120; 2.开头和结尾已给出不计入总词数. 提示词:课外阅读extracurricularreading DearJim Inyourlastletteryoutoldmethatyouwantedtolearnsomethingabouttheextracurricularreadinginourschool. Yours LiHua
Someexpertsfearthattoo﹣earlytocomputerswillhaveharmfulconsequencesforchildren'sdevelopment.A.exposure B.extension C.exhibition D.expansion
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