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在由直线x＝1，y＝x和x轴围成的三角形内任取一点（x，y），记事件A为y＞x3，B为y＞x2，则P（B|A）＝（ ）
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高三下学期数学《》真题及答案
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已知直线y＝2x＋8与x轴和y轴的交点的坐标分别是______________与两条坐标轴围成的三角
设函数fx＝ax－曲线y＝fx在点2f2处的切线方程为7x－4y－12＝0.1求fx的解析式2证明曲
直线y=2x－1与两坐标轴围成三角形面积是.
抛物线y＝x2在x＝1处的切线与两坐标轴围成的三角形区域为D.包含三角形内部与边界.若点P.xy是区
求直线y=2x﹣1与两坐标轴围成三角形的面积.
试求直线y=2x-1与y=x+2与x轴围成的三角形面积与y轴所围成的三角形面积
曲线y=x3在点11处的切线与x轴直线x=2所围成的三角形的面积为__________
曲线y=x3在点11处的切线与x轴直线x=2所围成的三角形的面积为.
一次函数y=﹣x+1与x轴y轴所围成的三角形的面积是.
直线y=x+6与x轴y轴围成的三角形面积为平方单位.
抛物线y=x2在x=1处的切线与两坐标轴围成三角形区域为D包含三角形内部和边界若点Pxy是区域D内
过点P.－32的两条直线mn与x轴围成直角三角形若直线n的方程为x＋2y－1＝0则围成的直角三角形的
2或3
3或4
4或5
5或6
直线l过点P.13且与xy轴正半轴围成的三角形的面积等于6的直线方程是
3x＋y－6＝0
x＋3y－10＝0
3x－y＝0
x－3y＋8＝0
设函数yxx≥0二阶可导且y’x＞0y0=1．过曲线y=yx上任意一点Pxy作该曲线的切线及z轴的垂
正比例函数ｙ＝２ｘ的图像与一次函数ｙ＝－３ｘ＋ｋ的图像交于点Ｐ１ｍ求１ｋ的值２两条直线与ｘ轴围成的三
已知直线y=x+6与x轴y轴围成一个三角形则这个三角形的周长为．
求两条直线y＝－2x－2和y＝2x－6与坐标轴所围成的三角形的面积
曲线y=x3在点11的切线与x轴直线x=2所围成的三角形面积为_________.[考场错解]填2由
已知直线y=x+6与x轴y轴围成一个三角形则这个三角形面积为．
已知直线m与y的交点在x轴下方与x轴距离2个单位长度且直线m过点1﹣1.1求直线m的表达式2求直线m
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“垛积术”隙积术是由北宋科学家沈括在梦溪笔谈中首创南宋数学家杨辉元代数学家朱世杰丰富和发展的一类数列求和方法有茭草垛方垛刍童垛三角垛等等．某仓库中部分货物堆放成如图所示的“茭草垛”自上而下第一层1件以后每一层比上一层多1件最后一层是n件．已知第一层货物单价1万元从第二层起货物的单价是上一层单价的．若这堆货物总价是万元则n的值为
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Cooperationatworkisgenerallyseenasagoodthing.ThelatestsurveybytheFinancialTimesofwhatemployerswantfromMBAgraduatesfoundthattheabilitytoworkwithawidevarietyofpeoplewaswhatmanagerswantedmost.Butmanagersalwayshavetobalancethebenefitsofteamworkwhichhelpensurethateveryoneisworkingtowardsthesamegoalwiththedangersof'groupthink'whencriticsarereluctanttopointoutaplan'sdrawbacksforfearofbeingkeptoutofthegroup.ThedisastrousBayofPigsinvasionofCubain1961wasaclassiccaseofgroupthink.SkepticswerereluctanttochallengeJohnF.KennedythenewlyelectedAmericanpresident.Moderncommunicationmethodsmeanthatcooperationismorefrequent.Workersareconstantlyintouchwitheachotherviaemailmessaginggroupsormobilecalls.Butdoesthatimproveorlowerperformance?AnewstudybythreeAmericanacademicstriedtoanswerthisquestion.Theysetalogicalproblemdesigningtheshortestrouteforatravellingsalesmanvisitingvariouscities.Threegroupswereinvolved:onewheresubjectsactedindependently;anotherwheretheysawthesolutionspostedbyteammembersateverystage;andathirdwheretheywerekeptinformedofeachother'sviewsonlyintermittently.Thesurveyfoundthatmembersoftheindividualistgroupreachedthepremiersolutionmoreoftenthantheconstantcooperatorsbuthadapooreraverageresult.Theintermittentcooperatorsfoundtherightresultasoftenastheindividualistsandgotabetteraveragesolution.Whenitcomestoidealgenerationgivingpeopleabitofspacetoasolutionseemstobeagoodidea.Occasionalcooperationcanbeabighelp:mostpeoplehavebenefitedfromacolleague'sbrainwaveorjustasoftenwiseadvicetoavoidaparticularcourseofaction.FurthercluescomefromabookSupermindsbyThomasMaloneoftheMassachusettsInstituteofTechnology.Hesaysthatthreefactorsdeterminethecollectiveintelligenceofcooperatinggroups:socialintelligencehowgoodpeoplewereatratingtheemotionalstatesofothers;theextenttowhichmemberstookpartequallyinconversationthemoreequalthebetter;andthecooperationofwomeninthegroupthehigherthebetter.Groupsrankedhighlyintheseareascooperatedfarbetterthanothers.Inshortcooperationmaybeausefultoolbutitdoesn'tworkineverysituation.1TheauthorcitestheexampleofTheBayofPigsinvasionofCubainParagraph1to.A.provethatteamplayersareskilledatcommunicationB.showthatteamworkcannotalwaysbebeneficialC.provethatcriticsareunwillingtochallengeanybodyD.showthedangerofgroupthinkisnotveryserious2Theunderlinedphrase'theintermittentcooperators'inParagraph3refersto.A.thosewhodonotcooperatewitheachotherB.thosewhoareseldominformedofother'sviewsC.thosewhocooperatewithothersoccasionallyD.theconstantcooperatorswithapooraverageresult3Whichofthefollowingfactorsmakesateamcooperatebetteraccordingtothefourthparagraph?A.Groupmemberscooperatingallthetime.B.Groupmembersinagoodemotionalstate.C.Equaldistributionofmenandwomen.D.Equalparticipationinthecommunication.4Whichcanbethebesttitleofthepassage?A.WhenTeamworkWorksB.WhatTeamworkIsAboutC.WhyTeamworkOperatesD.AUsefulTool:Cooperation
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设等差数列{an}的前n项和为Sn若a2＝3S4＝16则数列{an}的公差d＝．
若a+b≠0则的最小值为．
如图在四棱锥P﹣ABCD中AC与BD交于点O△ABC为直角三角形△ACD△PAB△PBC均为等边三角形． 1求证PO⊥BD 2求二面角A﹣PD﹣C的余弦值．
在△ABC中角ABC所对的边分别为abcsin2A+sin2B+sinAsinB＝2csinC△ABC的面积S＝abc． Ⅰ求角C Ⅱ求△ABC周长的取值范围．
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已知椭圆a＞b＞0的左右焦点分别为F1F2右顶点为A上顶点为B以线段F1A为直径的圆交线段F1B的延长线于点P若F2B∥AP则该椭圆离心率是
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某电商为某次活动设计了“和谐”“爱国”“敬业”三种红包活动规定每人可以依次点击4次每次都会获得三种红包的一种若集全三种即可获奖但三种红包出现的顺序不同对应的奖次也不同．员工甲按规定依次点击了4次直到第4次才获奖．则他获得奖次的不同情形种数为
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已知F1F2是椭圆+＝1的左右焦点点M的坐标为﹣1则∠F1MF2的角平分线所在直线的斜率为
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已知双曲线a＞0b＞0的一条渐近线方程为y＝2x且经过点P4则双曲线的方程是
Raisingachildcanbebutitiswellworthit. A.overthemoon B.apieceofcake C.onitslastlegs D.aHerculeantask
设复数z满足则z在复平面内的对应点位于
函数fx＝x2+xsinx的图象大致为
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设向量＝m0＝11且||2＝||2﹣|﹣|2则m等于
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