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已知=(2+sinx,1),=(2,﹣2),=(sinx﹣3,1),=(1,k).(x∈[0,π],k∈R). (1)()∥(+),求x的值: (2)是否存在实数k,使得(+)⊥(+)?若存在,...
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高一下学期数学《》真题及答案
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y=tanx
y=sinx
y=2cosx
y=2sinx
函数y=sinx-cosx的图象可由函数y=2sinx的图象至少向右平移个单位长度得到.
函数y=2sinx·cosx+1-2sin2x的最小正周期是.
π
2π
4π
已知函数fx=3|sinx|+2sinx则函数fx的最小正周期为
π
2π
4π
已知函数fx=2sinx•cosx+2cos2x﹣11求函数fx的单调递增区间.2求函数fx的最大值
将函数y=sinxx∈R.的图象上所有点的横坐标缩短为原来的一半纵坐标不变所得图象对应的函数解析式为
y=sin
,x∈R
y=sin2x,x∈R
y=
sinx,x∈R
y=2sinx,x∈R.
已知函数fx=2sinxcosx+sinx﹣2Ⅰ若点P﹣1在角α的终边上求fα的值Ⅱ若x∈[0]求f
已知向量=2sinxcosx=-sinx2sinx函数fx=·.Ⅰ求fx的单调递增区间Ⅱ在△ABC中
已知向量=2sinx2sinx=cosx﹣sinx求函数fx=•+1. 1如果fx=求sin4x
当x→0时2sinx1-cosx与x2比较是
冈阶但不等阶无穷小
等阶无穷小
高阶无穷小
低阶无穷小
函数y=2sinx·cosx+1-2sin2x的最小正周期是.
π
2π
4π
函数y=2sinx的值域是________.
函数y=2sinxsinx+cosx的最大值为.
已知函数fx=2sinxsinx+cosx﹣1 1将函数fx化为Asinωx+ϕ的形式 2求函
函数y=2sinx·cosx+1-2sin2x的最小正周期是.
π
2π
4π
函数fx=2sinx﹣cos2x的最大值为
1
2
3
4
已知函数fx=2sinxsinx+cosx则fx的最小正周期为最大值为.
曲线y=2sinx0≤x≤π与直线y=1围成的封闭图形的面积为.
命题∃x∈R2sinx≥1的否定是
∃x∈
R
,2sinx<1
∀x∈
R
,2sinx≥1
∃x∈
R
,2sinx≤1
∀x∈
R
,2sinx<1
函数的图像可由函数y=2sinx的图像至少向右平移个单位长度得到
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达人秀节目已经在多个国家火爆热播.当然人们也对这类节目持有不同的看法.请根据补全以下短文.Talentaregettingmoreandmorepopular.Allofthemhaveonethingin.Theytrytolookforthebestsingersdancersmagiciansactorsandsoon.Andthewinneralwaysaverygoodprize. noteveryoneenjoyswatchingtheseshows.Somepeoplethinkthatthelivesoftheperformersaremadeup.ButIthinkthemostimportantthingisthattogivepeopleawaytomaketheirdreamscome.1.2.3.4.5.
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如图若点P在反比例函数y=x<0的图象上过点P作PM⊥y轴于点MN为x轴上一点若△PNM的面积为3则k=
Mostpeopleagreethatapetaddsjoytoaperson'slife.Scientistsarenowfindingthathavingapetmaykeepitsowner1.Andgoodhealthmayaddyearstoaperson'slife. Scientistshavebeen2thelinkbetweenpetsandhealthforyears.In1990astudywasdonewithpeopleaged65andolder.It3thatpetownerswenttothedoctorlessthanpeople4pets.Dopetsmakepeople5?Arepeopleabletohandletheireverydaylivesbetter?AlanBeckwhoisaresearchersaysthat6theanswertothequestionsisyesthenhavingpetsmaybeagoodidea. Canpetsalsohelppeoplelivelonger?RebeccaJohnsondidastudyto7.Johnsonteachesnurseshowtocarefor8people.Herstudyshowsthathavingpetsmaycausepeopleto9moreslowly. Thehumanbodymakesmanychemicals.Someofthechemicalsmakepeoplefeel10.Othersmakepeoplefeelbad.InJohnson's11levelsofthegoodchemicals12whenpeoplewerearoundpetswhilelevelsofthebadchemicalswentdown.Thegood13seemedtoslowtheagingofcells.Ifthisis14maybepeopleshouldspendmoretimewiththeir15.Thenpeoplemightfeelbetterand16longer. Youmightbeallergic过敏的topets.Oryoumaynotwantto17apet.Neverfear.Aroboticorcomputerpetmaybejustthethingforyou. ScientistsaretestingcomputerpetsliketheroboticdogAIBO.Theywanttoseeif18petscanhelppeopletheway19dogsdo. Willaroboticpet20therealpetsittingwithyouonthesofa?Somethingtellsusthatitwillprobablybecomeareality. 1A.healthy B.excited C.mad D.hurried 2A.carryingout B.makingup C.lookingat D.breakingdown 3A.warned B.showed C.reminded D.advised 4A.through B.beyond C.against D.without 5A.busier B.funnier C.happier D.angrier 6A.though B.until C.if D.unless 7A.findout B.putout C.turnout D.setout 8A.sick B.friendly C.old D.lovely 9A.age B.move C.walk D.grow 10A.bored B.surprised C.sleepy D.good 11A.study B.work C.story D.case 12A.changed B.varied C.fell D.rose 13A.sides B.chemicals C.studies D.dogs 14A.important B.unusual C.true D.impossible 15A.children B.pets C.friends D.neighbors 16A.live B.wander C.stay D.travel 17A.headfor B.searchfor C.cheerfor D.carefor 18A.family B.computer C.baby D.toy 19A.brave B.quiet C.faithful D.real 20A.destroy B.replace C.improve D.accompany
不等式组的解集在数轴上表示正确的是
Hereareafewsuggestionstohelpyoumakea.
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水是生命之源我们应该了解爱护水资源. 水通电分解实验中检验正极产生的气体的方法是
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MyparentsdivorcedwhenIwas5makingmymotherasingleparent.Wehadlittlemoneybutmymomgavemealotoflove.EachnightshesatmeonherlapandspokethewordsthatwouldchangemylifeKemmonsyouarecertaintobeagreatmanandyoucandoanythinginlifeifyouworkhardenoughtogetit. AtfourteenIwashitbyacarandthedoctorssaidIwouldneverwalkagain.EverydaymymotherspoketomeinhergentlelovingvoicetellingmethatnomatterwhatthosedoctorssaidIcouldwalkagainifIwantedtobadlyenough.ShedrovethatmessagesodeepintomyheartthatIfinallybelievedher.AyearlaterIreturnedtoschool﹣walkingonmyown! WhentheGreatDepression大萧条occurredmymomlostherjob.ThenIleftschooltosupportthefamily.AtthatmomentIwasdeterminednevertobepooragain. MyrealchangeoccurredonavacationItookwithmywifeandfivekidsin1951.Iwasangrythatthesecondclasshotelchargedanextraforeachchild.ThatwastooexpensivefortheaverageAmericanfamily.Idecidedtoopenamotel汽车旅馆forfamiliesthatwouldneverchargeextraforchildren.Therewereplentyofdoubtersatthattime. Notsurprisinglymotherwasoneofmystrongestsupporters.Weexperiencedalotofchallenges.Butwithmymother'swordsdeeplyrootedinmysoulIneverdoubtedwewouldsucceed.Fifteenyearslaterwehadthelargesthotelsystemintheworld﹣HolidayInn.In1979mycompanyhad1759innsinmorethanfiftycountrieswithanincomeof1billionayear. Youmaynothavestartedoutlifeinthebestsituation.Butifyoucanfindataskinlifeworthworkingforandbelieveinyourselfnothingcanstopyou. 1WhenKemmonswasalittlechildwhathismotherusuallytoldhimwas. A.funny B.touching C.fighting D.encouraging 2Formtheauthor'sviewwhoplayedthemostimportantpartinmakinghimwalkbacktoschoolagain? A.Mother. B.Teachers. C.Friends. D.Relatives. 3AccordingtothepassagewhatmadeKemmonsstartamotelbyhimself? A.Hispreviousbusinesssuccessofvariouslevels. B.Histerribleexperienceinthehotel. C.Hismom'ssupport. D.Hiswife'ssuggestion. 4InyouropinionwhichofthefollowingbestdescribesKemmons'mother? A.Modesthelpfulandhardworking. B.Carefulhelpfulandbeautiful. C.Lovingsupportiveandstrongwilled. D.Strictsensitiveandsupportive.
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高一下学期数学
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