首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
已知函数f(x)=xlnx. (Ⅰ)求f(x)在x=e(e为自然对数的底数)处的切线方程. (Ⅱ)求f(x)的最小值.
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
已知函数fx=ln1+x-xgx=xlnx.Ⅰ求函数fx的最大值Ⅱ设0
10.00分已知函数fx=xlnx. 1求fx在[3]上的最大值与最小值 2求证fx﹣x+12
已知函数fx=xlnx.1求函数fx的单调递减区间2若fx≥﹣x2+ax﹣6在0+∞上恒成立求实数a
已知函数fx=ax+xlnxa为常数e为自然对数的底数曲线y=fx在点efe处的切线方程为y=3x﹣
若函数y=fx在x=x0处取得极大值或极小值则称x0为函数y=fx的极值点.已知函数fx=ax3+3
已知函数fx=xlnx.1求fx的最小值2讨论关于x的方程fx-m=0m∈R的解的个数.
已知函数fx当x>0时满足fx+3[f’x]2=xlnx且f’1=0则
f(1)是函数f(x)的极大值.
f(1)是函数f(x)的极小值.
(1,f(1))是曲线y=f(x)的拐点.
f(1)不是函数f(x)的极值,(1,f(1))也不是曲线y=f(x)的拐点.
已知fx=xlnxgx=x3+ax2﹣x+2.Ⅰ如果函数gx的单调递减区间为求函数gx的解析式Ⅱ在Ⅰ
已知函数fx=a﹣bx2﹣x﹣xlnx. 1若曲线y=fx在点1f1处的切线与x轴平行且f1=a
已知函数fx=xlnx.Ⅰ求fx的最小值Ⅱ若对所有x≥1都有fx≥ax﹣1求实数a的取值范围.Ⅲ若关
已知函数gx=xlnx﹣ax﹣1.Ⅰ求函数fx在点4f4处的切线方程Ⅱ若对任意x∈0+∞不等式gx≥
已知函数fx=xlnxgx=ax+b. Ⅰ求函数fx的单调区间 Ⅱ若函数gx的图象是fx=xl
已知函数fx=xlnx. Ⅰ讨论y=fx的单调性并求极值 Ⅱ证明当x>1时ln2x+1>lnx
已知函数fx=xlnx. 1求这个函数的导数 2求这个函数的图象在点x=e处的切线方程.
已知函数fx=e是自然对数的底数hx=1﹣x﹣xlnx.1求曲线y=fx在点A.1f1处的切线方程2
已知函数fx=xlnxgx=﹣x2+ax﹣3.Ⅰ求函数fx的极值Ⅱ若对∀x∈0+∞有2fx≥gx恒成
已知函数fx=+xlnxm>0gx=lnx-2.1当m=1时求函数fx的单调增区间2设函数hx=fx
已知函数fx=xlnx. Ⅰ求fx的最小值 Ⅱ若对所有x≥1都有fx≥ax﹣1求实数a的取值范
已知函数fx=xlnx. Ⅰ求fx的最小值 Ⅱ若对所有x≥1都有fx≥ax﹣1求实数a的取值范
已知函数fx=x﹣lnx+a﹣1gx=+ax﹣xlnx其中a>0.1求fx的单调区间2当x≥1时gx
热门试题
更多
某小型机械厂共有工人100名工人年薪4万元/人.据悉该厂每年生产x台机器除工人工资外还需投入成本Cx万元Cx=且每台机器售价为50万元.通过市场分析该厂生产的机器能全部售完. Ⅰ写出年利润Lx万元关于年产量x的函数解析式 Ⅱ求年产量为多少台时该厂在生产中所获利润最大
函数y=log3x2-2x的单调减区间是.
WhenIwasateenagerIvolunteeredtoworkatthewaterstationata10000mrace.Myjobwasto1watertotherunners.Irememberbeingso2toseeallthedifferentkindsofpeoplewhopassedbyandgrabbedacupofwater.Someranpastsomewalkedpastandafewwheeledpast.Isawsomanytypesofpeopledoingit.IthoughtmaybeIcoulddoittoo!SothenextyearI3upfortherace. Thatfirst10000mracewasquitean4.IjoggedIwalkedIjoggedandIwalked.5Ididn'tknowifIcouldfinish.Thencameadefining决定性作用的6. Atonepointneartheenda70﹣year﹣oldmanranpastmeveryveryfastandIfelt7becauseIwas15yearsyoungerthanhebutIcouldn'tevenkeepupwithhim.Ifelt8forasecond. ButthenI9something.HewasrunninghisraceandIwasrunningmine.Hehad10abilitiesexperiencetrainingandgoalsforhimself.Ihadmine.Remembermy11wasonlytofinish. Afteraminuteit12methatthiswasalessonIcoulddrawfrom.Ilearnedsomethingaboutmyselfinthatmoment.Iturnedmyembarrassmentinto13. I14thatIwouldnotgiveuponrunningraces.InfactIwouldrunevenmoreracesandIwouldlearnhowtotrainandprepare15andonedayIwouldbeoneofthose70﹣year﹣oldpersonswhowerestillrunning.AsIcrossedthefinishlineIwasproudofmy16. Inlifeweallhavethosemomentswherewe17ourselvestoothers.It'sonly18.Don'tallowthosemomentsto19you.Turnthemintomotivationandlettheminspireyou.Withtheproperpreparationandtrainingyoucanimproveyourresultto20anythingyouwantinlife. 1A.bringout B.passout C.takeout D.pickout 2A.excited B.worried C.concerned D.anxious 3A.gave B.made C.signed D.dressed 4A.achievement B.encouragement C.instruction D.experience 5A.Attimes B.Intime C.Inall D.Afterall 6A.victory B.decision C.moment D.conclusion 7A.embarrassed B.annoyed C.moved D.thrilled 8A.relaxed B.defeated C.puzzled D.inspired 9A.realized B.lost C.noticed D.remembered 10A.special B.evident C.common D.different 11A.motto B.plan C.goal D.direction 12A.worried B.hit C.reached D.hurt 13A.attraction B.devotion C.inspiration D.expectation 14A.hoped B.promised C.decided D.suggested 15A.slightly B.hardly C.clearly D.properly 16A.excitement B.accomplishment C.movement D.judgement 17A.introduce B.relate C.present D.compare 18A.important B.natural C.strange D.ridiculous 19A.weaken B.wound C.amuse D.cheer 20A.reserve B.deliver C.achieve D.Abandon
已知f+1=x+2则f2=.
已知m∈R“函数y=2x+m-1有零点”是“函数y=logmx在0+∞上为减函数”的
某小型机械厂共有工人100名工人年薪4万元/人.据悉该厂每年生产x台机器除工人工资外还需投入成本Cx万元Cx=且每台机器售价为50万元.通过市场分析该厂生产的机器能全部售完. Ⅰ写出年利润Lx万元关于年产量x的函数解析式 Ⅱ求年产量为多少台时该厂在生产中所获利润最大
已知函数fx=|x﹣4|+|x| 1求不等式fx<12的解集 2对任意的x∈Rt∈R+都有不等式fx≥t﹣4﹣9+m恒成立求实数m的取值范围.
已知ab为正实数函数fx=|x-a|-|x+2b|. 1求函数fx的最大值 2若函数fx的最大值为1求a2+4b2的最小值.
下列函数中既是偶函数又在区间0+∞上单调递减的是
已知下面四个命题 ①“若x2-x=0则x=0或x=l”的逆否命题为“若x≠0且x≠1则x2-x≠0” ②“x<1”是“x2-3x+2>0”的充分不必要条件 ③命题P存在x0∈R使得x02+x0+1<0则¬p任意x∈R都有x2+x+1≥0 ④若P且q为假命题则pq均为假命题 其中真命题个数为
函数fx=ex+x-2的零点所在的一个区间是
电容器是一种常用的电子元件.对电容器认识正确的是
Americaisamobilesociety.FriendshipsbetweenAmericanscanbecloseandrealyetdisappearsoonifsituationschange.Neithersidefeelshurtbythis.BothmayexchangeChristmasgreetingsforayearortwoperhapsafewlettersforawhile﹣thennomore.Ifthesametwopeoplemeetagainbychanceevenyearslatertheypickupthefriendship.ThiscanbequitedifficultforusChinesetounderstandbecausefriendshipsbetweenusflowermoreslowlybutthenmaybecomelifelongfeelingsextendingsometimesdeeplyintobothfamilies. Americansarereadytoreceiveusforeignersattheirhomessharetheirholidaysandtheirhomelife.Theywillenjoywelcomingusandbepleasedifweaccepttheirhospitalityeasily. AnotherdifficultpointforusChinesetounderstandAmericansisthatalthoughtheyincludeuswarmlyintheirpersonaleverydaylivestheydon'tshowtheirpolitenesstousifitrequiresagreatdealoftime.Thisisusuallytheoppositeofthepracticeinourcountrywherewemaybegenerouswithourtime.Sometimesweashostswillappearatairportseveninthemiddleofthenighttomeetafriend.Wemaytakedaysofftoactasguidestoourforeignfriends.TheAmericanshoweverexpresstheirwelcomeusuallyathomesbuttrulycannotmanagethetimetodoagreatdealwithavisitoroutsidetheirdailyroutine.Theywillprobablyexpectustogetourselvesfromtheairporttoourownhotelbybus.Andtheyexpectthatwewillphonethemfromthere.Oncewearriveattheirhomesthewelcomewillbefullwarmandreal.Wewillfindourselvestreatedhospitably. FortheAmericansitisoftenconsideredmorefriendlytoinviteafriendtotheirhomesthantogotorestaurantsexceptforpurelybusinessmatters.Soaccepttheirhospitalityathome! 1Thewriterofthispassagemustbe. A.anAmerican B.aChinese C.aprofessor D.astudent 2WhichofthefollowingstatementsisTRUEaccordingtothepassage? A.FriendshipsbetweenAmericansusuallyextenddeeplyintotheirfamilies. B.FriendshipsbetweenAmericansusuallylastforalltheirlives. C.Americanswillcontinuetheirfriendshipsagainevenafteralongbreak. D.Americansalwaysshowtheirwarmtheveniftheyareverybusy. 3TheunderlinedwordsgenerouswithourtimeinParagraph3probablymean. A.strictwithtime B.seriouswithtime C.carefulwithtime D.willingtospendtime 4Asuitabletitleforthispassagewouldprobablybe. A.FriendshipsbetweenChinese B.FriendshipsbetweenAmericans C.Americans'hospitality D.Americans'andChinese'sviewsoffriendships
在国际单位制中电荷量的单位是
已知函数fx=ax-1-lnxa∈R. Ⅰ讨论函数fx在定义域内的极值点的个数 Ⅱ已知函数fx在x=1处取得极值且对∀x∈0+∞fx≥bx-2恒成立求实数b的取值范围.
带电粒子MN在电场中的受力方向如图所示由图可以判断
已知函数fx=ax-1-lnxa∈R. Ⅰ讨论函数fx在定义域内的极值点的个数 Ⅱ已知函数fx在x=1处取得极值且对∀x∈0+∞fx≥bx-2恒成立求实数b的取值范围.
已知函数fx=asinx+bx3+4a∈Rb∈Rf′x为fx的导函数则f2016+f-2016+f′2017-f′-2017=
已知函数fx=若关于x的方程ffx=m只有两个不同的实根则m的取值范围为
已知f+1=x+2则f2=.
已知ab为正实数函数fx=|x-a|-|x+2b|. 1求函数fx的最大值 2若函数fx的最大值为1求a2+4b2的最小值.
已知下面四个命题 ①“若x2-x=0则x=0或x=l”的逆否命题为“若x≠0且x≠1则x2-x≠0” ②“x<1”是“x2-3x+2>0”的充分不必要条件 ③命题P存在x0∈R使得x02+x0+1<0则¬p任意x∈R都有x2+x+1≥0 ④若P且q为假命题则pq均为假命题 其中真命题个数为
下列函数中既是偶函数又在区间0+∞上单调递减的是
函数y=log3x2-2x的单调减区间是.
函数fx=ex+x-2的零点所在的一个区间是
增加在缺词处加一个漏词符号^并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及修改均仅限一词2.只允许修改10处多者从第11处起不计分. TheotherdayIwasinvitedmyfriendSam'shomefordinner.IfeltabitsurprisingwhenIsawBillthere.ItwastwomonthsincewetwohadquarreledsoIwasembarrassedanddidn'tknowhowtodo.IsatdownonthesofabutbegantowatchTV.LaterSamcametoaskmetomakeupwithBill.UntilthenIrealizethatSamhadarrangedthemeetingonpurpose.HewentuptoBillandgreetedhimwarmlysmiledathim.Helookedveryhappilyandtalkedwithmeexcitedly.Thatnightwehadagreatfuntogether.
已知函数fx=若关于x的方程ffx=m只有两个不同的实根则m的取值范围为
已知m∈R“函数y=2x+m-1有零点”是“函数y=logmx在0+∞上为减函数”的
已知函数fx=asinx+bx3+4a∈Rb∈Rf′x为fx的导函数则f2016+f-2016+f′2017-f′-2017=
Whenhewasdrivinghomeoneeveningonacountryroadhesawanoldladystranded抛锚的onthesideoftheroad.Hestoppedinfrontofhercarandgotout.Evenwiththesmileonhisfaceshewasworried.Helookedpoorandhungry.Heknewhowshefelt.Hesaid'Iamheretohelpyoumadam.Whydon'tyouwaitinthecarwhereit'swarm?BythewaymynameisJoe. Shehadaflattire轮胎.Joecrawledunderthecarchangedthetire.Buthegotdirtyandhishandshurt.Shecouldnotthankhimenoughandaskedhimhowmuchsheowedhim.HetoldherthatifshereallywantedtopayhimbackthenexttimeshesawsomeonewhoneededhelpshecouldgivethatpersonthehelptheyneededandJoeaddedAndthinkofme. Shedroveoff.Afewmilesdowntheroadtheladysawasmallrestaurant.Shewentin.Thewaitresshadasweetsmileandwasnearlyeightmonthspregnant怀孕Theoldladywonderedhowsomeonelikeherwhoseemedpoorcouldbesokindtoastranger.ThensherememberedJoe.Aftertheladyfinishedhermealthewaitresswenttogetherchangefromahundred﹣dollarbill.Butshesteppedrightoutthedoor. Whenthewaitresscamebackshenoticedsomethingwrittenonanapkin餐巾Iamhelpingyoubecausesomeoneoncehelpedme.Ifyoureallywanttopaymebackhere‘swhatyoudo﹣﹣Donotletthechainofloveendwithyou. Thatnightwhenshegothomeshewasthinkingaboutthemoneyandwhattheladyhadwritten.Sheandherhusbandneededmoneywiththebabydue预产期nextmonth.SheknewhowworriedherhusbandwasandashelaysleepingnexttohershewhisperedEverything'sgoingtobeallright.IloveyouJoe. 1WhenJoestoppedtohelptheladyshe. A.becameexcited B.refusedhisoffer C.wasafraidtobehurt D.thankedhim 2Whydidtheladyleavetherestaurantwithoutgettingherchange? A.Sheforgotit. B.Shewantedtogivethewaitresssomehelp. C.Shewouldgetitlater. D.ShewantedtohelpJoe. 3Wecanlearnfromthetextthat. A.Joe'sbossfiredhim. B.Joe'swifewasthewaitress. C.Joeworkedasadriver. D.Joehadanunhappymarriage. 4Bytellingthestorythewritertriestoshowthat. A.helpingothersmadeoneselfhappy. B.ahappyfamilydependsonahappymarriage C.povertyisnotathreattoahappymarriage. D.kindnesscanbespread.
热门题库
更多
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
高三下学期英语
教案备课库