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,a∈R. (1)若函数f(x)在x=1处的切线为y=2x+b,求a,b的值; (2)记g(x)=f(x)+ax,若函数g(x)在区间(0,)上有最小值,求实数a的取值范围; (3)当...
查看本题答案
包含此试题的试卷
高三下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
已知函数fx=x-alnxa∈R..1当a=2时求曲线y=fx在点A.1f1处的切线方程2求函数fx
已知函数fx=x﹣alnxa∈R..1当a=2时求曲线y=fx在点A.1f1处的切线方程2若对于x∈
已知函数fx=gx=alnxa∈R.若曲线y=fx与曲线y=gx相交且在交点处有相同的切线求a的值及
已知函数m∈R.1当m=1时求曲线y=fx在点2f2处的切线方程2若fx在区间﹣23上是减函数求m的
已知函数fx在R.上满足fx=2f2-x-x2+8x-8则曲线y=fx在点1f1处切线的斜率是
2
1
3
-2
已知函数fx=+x+b其中ab∈R.1若曲线y=fx在点P2f2处的切线方程为y=5x-4求函数fx
已知函数fx是R.上的偶函数gx是R.上的奇函数且gx=fx-1若g1=2则f2014的值为
2
0
-2
±2
已知函数fx=ex﹣ax﹣1e为自然对数的底数a>0.1若a=1求函数fx在x=0处的切线方程2若f
已知函数fx=lnx-mxmR..Ⅰ若曲线y=fx过点P.1-1求曲线y=fx在点P.处的切线方程Ⅱ
已知函数fx=2lnx﹣x2﹣ax+3其中a∈R.Ⅰ设曲线fx在点1f1处的切线与直线2x﹣y+1=
已知函数fx=lnx﹣ax﹣1a∈R..Ⅰ若a=﹣2求曲线y=fx在点1f1处的切线方程Ⅱ若不等式f
已知函数fx=x3+1-ax2-aa+2x+bab∈R..1若函数fx的图象过原点且在原点处的切线斜
已知函数fx=exlnx-aexa∈R.1若a=2求fx在点1f1处的切线方程2若fx在0+∞上是单
已知函数.Ⅰ若函数fx在x=1处的切线l过原点求a的值及切线l的方程Ⅱ若a=2且存在t∈R.使得ft
已知函数fx=x3+1-ax2-aa+2x+bab∈R..1若函数fx的图像过原点且在原点处的切线斜
已知函数fx=x2+alnxa∈R.1若函数fx在x=1处的切线垂直y轴求a的值2若函数fx在区间1
已知函数m∈R.1当m=1时求曲线y=fx在点2f2处的切线方程2若fx在区间﹣23上是减函数求m的
已知函数fx=x2-ax+2lnxa∈R.Ⅰ若曲线y=fx在1f1处的切线垂直于直线y=x求函数fx
设函数fx=a∈R.Ⅰ若fx在x=0处取得极值确定a的值并求此时曲线y=fx在点1f1处的切线方程Ⅱ
已知函数fx=ax+blnx+cabc是常数在x=e处的切线方程为e-1x+ey-e=0且f1=0.
热门试题
更多
2分随着考试的临近所有学生都开始专注于复习功课. allthestudentsbegantotheirlessons.
某人喝醉了酒絮絮叨叨语无伦次这一现象说明酒精麻痹了
20分假设你是育才中学学生会__李华.上周你校邀请美国某大学的卫斯理教授来校做了一场关于各国身势语的专题讲座.请你代表你校全体学生用英语给他写一封信内容包括 1表示感谢.2你的收获. 注意1.词数100左右.信的开头和结尾已经给出不计入总词数 2.可适当增加细节以使行文连贯. DearMr.Wesley I'mLiHuachairmanoftheStudentUnionofYucaiMiddleSchool._____ Thankyouagainandbestwishestoyou. Yours LiHua
1分CthattheFatherChristmaswouldcometodelivergiftsduringthenightthechildrenwillinglywenttobedearlierthanbefore.
6分Inahotsummerthere'snobetterplacethanaUKbeach﹣theseshoresofferwalksandwildlifepicnicsandrockpools. RunswickBayNorthYorkshir Itisapopulardestinationforrockpoolerswalkersandhunters.Manyofthehomesarenowholidayaccommodationslinkedbypathsandwalkwaysratherthanstreets.TheRoyalHotelattheheartofthevillageoffershomemadecakesandcoffeealongsideasimplebuttastybarmenuandlocalBlackSheepbitterondraft. StayinCastleHousesleepssixthreenightsfrom£500atthetopofthevillagehassweepingviewsofthebayfromacomfortablewindowseat. SouthShoreBrownseaIslandDorset ReachedbyferryfromthemoneyedshoresofSandbanksBrownseaIslandisapocketofsafewildernessinPooleharbour.FamousforitsredsquirrelpopulationandasthesiteofBaden﹣Powell'sfirstScoutcampitsmixtureofwoodlandwildlandandpondssuitsadayofexplorationandadventure.Pushyourselfintothesandybanksandenjoyviewsacrosstheharbourinthecompanyofvariousseabirds. StayinNationalTrust﹣ownedCustomHouseontheseaportsleepsfourthreenightsfrom£622offersarealBrownseaexperience. KingsgateBayBroadstairsKent ThelackofaconvenientcarparkmeansthatKingsgateBaybetweenMargateandBroadstairsisquieterthanotherbeachesontheThanetcoast.AshortwalkfromthecarparkatneighboringJossBaypopularwithsurfershoweverwilltakeyoutothisshelteredsandybaywithitsseacaves.Itisalsoasafeplacetoswimandcanoe. StayintheBotanyBayHotelfamilyroomsfrom£80B&Bhassomedog﹣friendlyrooms. 1Whichofthefollowingsuitsyoumostifyouareananimallover A.JossBay. B.KingsgateBay. C.SouthShore. D.RunswickBay. 2Whatcanwelearnfromthepassage A.RunswickBaycanbeaccessiblebyferry. B.YourpetdogsareadmittedintotheBotanyBayHotel. C.TherearelotsofconvenientcarparksforvisitorsatKingsgateBay. D.YoucanenjoyhomemadecakesduringyourstayintheBotanyBayHotel. 3Whatkindofpeopleisthetextmainlywrittenfor A.Scientists. B.Students. C.Tourists. D.Artists.
爷爷的腿部肌肉经常抽搐血液中含量偏低的离子可能是
如图表示物质跨膜运输的一种方式下列物质运输过程利用该方法进行的是
图1是植物细胞的亚显微结构模式图图2是光学显微镜下观察到的某一时刻的图象取形状大小相同的红心萝卜A和红心萝卜B各5段分别放在不同浓度的蔗糖溶液甲~戊中一段时间后取出称重结果如图3所示.据图回答问题 1图1中具有双层膜的细胞器有填序号如果此图为洋葱根尖成熟区细胞则应该没有填序号. 2图2中的细胞液浓度与外界溶液浓度的关系是.填“大于”“小于”或“不能确定”. 3若该植物细胞吸收18O2放射性元素18O填“能”或“不能”出现在呼吸作用产生的CO2中. 4据图3分析红心萝卜A的细胞液浓度比红心萝卜B的细胞液浓度填“高”“低”或“相等”由图中两种红心萝卜的质量变化结果可知甲~戊五种蔗糖溶液的浓度从小到大依次为.
15分OnApril15thFrance'sworld﹣famousNotre﹣damedeParisCathedralcaughtfire.Flamescouldbeseenrisingthroughthetopofthemonument.1ittallnarrowspire塔尖wassoondestroyed. TheCathedral2datesbacktothe12thcenturyisoneoftheworld'smostfamoustourist3attraction.About12millionpeoplevisititeachyear.Itsitsin4centerofParisalongtheSeinesRiver. ThemayorofParisAnneHidalgowroteonTwitterMondayA5terrorfireisunderwayatNotre﹣damedeParisCathedral.HeaddedthatParisfirefighterswerestilltryingtocontainthefire.Sheurgedpeople6stayawayfromthearea.FrenchPresidentMacrondelayeda7schedulespeechandarrivedatthesceneofthefireMondaynight.Thecauseofthefirewasnot8immediateknown. Afterthefireworkerssoongotdown9restoringpartsofNotre﹣dame.Partsofthemonument10surroundbyametalandwoodsupportstructure.BesidestheCathedral'sbronzestatueswereremovedforrepairs.
8分Wetendtobelievethatolderpeoplearemorepositiveandyoungerpeoplearemoresensitivetosocialcues暗示. Recentlyscientistsinvestigatedthisideabytesting10000menandwomen.Theywantedtoseeifageaffectedaperson'sabilitytoidentifysubtlefacialemotionssuchasfearandanger. TheresearchersusedaWeb﹣basedplatformtocollectdata.Itshowedtheparticipantstwoheadshotsofrandompeople.Theywerethenaskedtoidentifywhichsubjectwasangrierhappierormorefearful.Theresearchfoundthatyoungerpeoplewereabletobetteridentifyangryandfearfulfacialcuesthanolderpeople. WeknowfromstudiesthattheeverydayexperiencesofanadolescentaredifferentfromanolderpersonbutwewantedtounderstandhowtheseexperiencesmightbelinkedwithdifferencesinbasicemotionunderstandingwroteLauraGerminethestudy'sseniorauthor. Butwhatisitthatmakesyoungpeoplemoresensitive Thisistheexactagewhenyoungpeoplearemostsensitivetoformsofnegativesocialcuessuchasbullying欺凌LaurenRutterthestudy'sleadauthortoldScienceDaily.Thenormaldevelopmentofangersensitivitycancontributetosomeofthechallengesthatariseduringthisstageofdevelopment. Onthecontraryacrossthewhole10000﹣personsurveyresearchersfoundnodecreaseinthesenseofhappinessamongolderparticipantsandthesefindingsfitwellwithotherresearchesshowingthatolderadultstendtohavemorepositiveemotions. Nowtheteamisworkingtowardanewstudythatexamineshowemotionalsensitivityisrelatedtodifferentaspectsofmentalhealthsuchasanxietyanddepression. 1Whatcanweknowfromthepassage A.Olderpeoplearemoreallergictosocialcues. B.TheresearchersgaineddatafromtheInternet. C.Olderpeoplearelesslikelytoidentifyhappinessintheresearch. D.Adolescents'sensitivitytonegativesocialcuesdoesharmtotheirdevelopment. 2Howwastheresearchcarriedout A.Byassumingandanalyzing. B.Byquestioningandtracing. C.Byreasoningandconcluding. D.Bysurveyingandcollectingstatistics. 3Whatsectionofanewspaperisthepassageprobablytakenfrom A.Technology. B.Investigations. C.Education. D.Lifestyle. 4Whatistheteamplanningtofindoutnext A.Therelationshipbetweenemotionsandexperiences. B.Theemotionaldifferencesbetweentheyoungandtheold. C.Theconnectionbetweensensitivityofemotionsandmentalhealth. D.Thedifferentresponsestosocialcuesbetweentheyoungandtheold.
某濒危动物种群迁入新环境后的数量变化如图所示该种群增长速率最快的点为
人体内环境是细胞与外界环境进行物质交换的媒介人体肝细胞生活的内环境是
1分TheMid﹣autumnFestivalwasoriginallyoindifferentwaysincelebrationoftheirgoodharvest.
10分EleanorRooseveltoneofthemostsuccessfulinfluentialandbelovedwomeninAmericanhistoryoncesaidthatshehadoneregretshewishedshehadbeenprettier.Whohasn'tfeltthesameway1Toovercomethemwespendbillionsofdollarseveryyearoncosmeticsdietproductsfashionandsoon. WhydowecaresomuchabouthowwelookBecauseitmatters.Becausebeautyispowerful.Becauseevenwhenwelearntovaluepeoplemostlyforbeingkindandwiseandfunnywearestillmovedbybeauty.Nomatterhowmuchweargueagainstitbeautyhasgreatinfluenceonus.2 AristotlesaidBeautyisagreaterrecommendationthananyletterofintroduction.3Wesimplytreatbeautifulpeoplebetterthanwedoothers.Attachaphotographofabeautifulauthortoanessayandpeoplewillthinkthatitismorecreativeandmoreintelligentlywrittenthanexactlythesameessayaccompaniedbythephotoofahomelyauthor. Oursensitivitytophysicalbeautyisnotsomethingwecancontrolatwill.4ExperimentsconductedbypsychologistJudithJ.Langloisshowedthatevensmallbabiesprefertolookatattractivefaces.BeforetheyhavemetasinglesupermodelbeforetheyhavewatchedasingleTVshowbeforetheyhaveopenedupasinglefashionmagazinetheyaredrawntothesamefaceswhichadultshavejudgedtobeattractive. 5JustasNancyEtcoffsaysWehavetounderstandbeautyorwewillalwaysbeenslavedbyit.Ifyouaimtobewiseandkindandfunnyitdoesn'tmeanthatyoucan'talsotryyourbesttolookbeautiful.There'snoreasontofeelguiltyaboutbeingmovedbybeauty'spower.Itmovesusall. A.Wearebornwithit. B.It'snotfairbutit'strue. C.Thereissimplynoescape. D.Itactuallydoesnotmakeanysense. E.Weareallproudofourachievements. F.Wearealltooawareofourphysicalimperfections. G.Howevertherearemoreimportantthingsinlifethanbeauty.
艾弗里等人为了弄清转化因子的本质进行了一系列的实验.下图是他们所做的一组实验则三个实验的培养皿中存在的两种菌落的是 实验一R型菌+加热杀死的S型菌的DNA+RNA酶→ 实验二R型菌+加热杀死的S型菌的DNA+DNA酶→ 实验三R型菌+加热杀死的S型菌的DNA+蛋白酶→
某生态系统能量流动过程如图所示下列叙述正确的是
1分Thechildshowedgreatinterestineverythinginthemuseumandhekeptaskingalotofquestionsc.
某生物兴趣小组对教材中色素提取和分离的实验步骤进行了改进采用水浴法提取叶绿体中色素主要操作如图所示.下列叙述错误的是
能发生基因重组的过程是
如图为生物体内核酸的基本组成单位﹣﹣核苷酸的模式图DNA和RNA在核苷酸上的区别在于
2分她对于教书职业的全身心投入给我们所有人留下了很深的印象. theteachingcareerhasleftallofus.
细胞中ATP在有关酶的催化作用下释放出大量能量并转化成
25分假定你是阳光国际学校的学生李华你校将迎来20周年校庆.校史馆拟从本校学生中招募若干名英语解说员.请你根据要求用英语写一封信申请该职位内容主要包括 1.写信目的 2.申请理由 3.期待回复. 注意1.词数100左右开头和结尾已给出不计入总词数. 2.可适当增加细节以使行文连贯. DearSirorMadam Yourssincerely LiHua
如图是动物细胞减数分裂某一时期的示意图.关于该细胞的叙述正确的是
“不是花中偏爱菊此花开尽更无花”观赏菊有很多漂亮的品种这些品种的产生主要是来自
蛋白质合成过程中氨基酸分子脱水缩合形成的化学键是
1分None'sheaddoesnotalwaysmeansshowingagreementunderstandingorapproval.
下列关于生物多样性的叙述正确的是
人类ABO血型和基因型的如表所示.某对夫妻血型分别是B型和O型后代的血型可能是
胚芽鞘在单侧光照射下向光弯曲生长针对这一现象的解释错误的是
热门题库
更多
高一上学期英语
高一下学期化学
高一下学期物理
高三下学期数学
高三上学期数学
高一下学期英语
教案备课库
高一上学期生物
高一下学期生物
高二上学期数学
高二上学期物理
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