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双曲线x2﹣y2＝1的顶点到其渐近线的距离等于（ ）
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高一下学期数学《》真题及答案
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已知双曲线＝1a>0b>0的两条渐近线方程为y＝±x若顶点到渐近线的距离为1求双曲线方程.
双曲线－y2＝1的顶点到其渐近线的距离等于
已知双曲线的顶点到渐近线的距离为2焦点到渐近线的距离为6则该双曲线的离心率为．
已知双曲线-=1的右焦点与抛物线y2=12x的焦点重合则该双曲线的焦点到其渐近线的距离等于
4
3
5
双曲线的右焦点到渐近线的距离是其到左顶点距离的一半则双曲线的离心率▲.
已知双曲线=1a＞0b＞0的右焦点到左顶点的距离等于它到渐近线距离的2倍则其渐近线方程为
2x±y=0
x±2y=0
4x±3y=0
3x±4y=0
已知双曲线的中心是原点焦点到渐近线的距离为2一条准线方程为y＝－1则其渐近线方程为.
已知双曲线C.1:-=1a>0b>0的离心率为2.若抛物线C.2:x2=2pyp>0的焦点到双曲线C
x2=
y
x2=
y
x2=8y
x2=16y
若双曲线x2-=1a>0的一个焦点到一条渐近线的距离等于则此双曲线的方程为.
已知双曲线-=1a>0b>0的两条渐近线方程为y=±x若顶点到渐近线的距离为1则双曲线方程为.
2018年·北京通州区三模双曲线﹣y2=1的顶点到其渐近线的距离等于．
已知双曲线的顶点到渐近线的距离为2焦点到渐近线的距离为6则该双曲线的离心率为.
已知双曲线的中心在原点焦点在x轴上离心率e=2且焦点到渐近线的距离等于3求双曲线的标准方程及渐近线方
已知双曲线的焦点在x轴上两个顶点间的距离为2焦点到渐近线的距离为.1求双曲线的标准方程2写出双曲线的
已知双曲线C的方程为2x2﹣y2=21求双曲线C的离心率2求双曲线C的右顶点A到双曲线C的渐近线的距
已知双曲线的焦点在x轴上两个顶点间的距离为2焦点到渐近线的距离为.1求双曲线的标准方程2写出双曲线的
2017年·上海黄浦区二模已知双曲线＝1a＞0b＞0的右焦点到左顶点的距离等于它到渐近线距离的2倍
2x±y＝0
x±2y＝0
4x±3y＝0
3x±4y＝0
双曲线 x 2 - y 2 = 1 的顶点到其渐近线的距离等于____________.
双曲线x2-y2=1的顶点到其渐近线的距离等于
1
已知双曲线的右焦点与抛物线y2=12x的焦点重合则该双曲线的焦点到其渐近线的距离等于
3
5
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如图所示质量M＝2kg的半圆形槽物体A放在光滑水平地面上槽内表面光滑其半径r＝0.6m．现有一个质量m＝1kg的小物块B在物体A的槽右端口获得瞬时竖直向下的冲量I＝2N•S此后物体A和物块B相互作用使物体A在地面上运动则
实验室有一破损的双量程电压表两量程分别是3V和15V其内部电路如图所示因电压表的表头G已烧坏无法知道其电学特性但两个精密电阻R1R2完好测得R1＝2.9kΩR2＝14.9kΩ．现有两个表头外形都与原表头G相同已知表头的满偏电流为1mA内阻为50Ω表头的满偏电流0.5mA内阻为200Ω又有三个精密定值电阻r1＝100Ωr2＝150Ωr3＝200Ω．若保留R1R2的情况下对电压表进行修复根据所给条件回答下列问题 1原表头G满偏电流I＝内阻r＝． 2在虚线框中画出修复后双量程电压表的电路标识出所选用的相应器材符号 3某学习小组利用修复的电压表再加上可以使用的以下器材 测量一未知电阻Rx的阻值 电流表A量程0～5mA内阻未知 最大阻值约为100Ω的滑动变阻器 电源E电动势约3V 开关S导线若干． 由于不知道未知电阻的阻值范围学习小组为精确测出未知电阻的阻值选择合适的电路请你帮助他们补充完整电路连接正确连线后读得电压表示数为2.40V电流表示数为4.00mA则未知电阻阻值Rx为Ω．
30分Thislifeissofullofbeautifulmoments.Allyouhavetodoisopenyoureyesandyour1toseethem.Isawonejusttheotherday. ThelocalelementaryschoolhadjustletoutandI2myselfbehindaschoolbusasIwas3home.Thebusstoppedbyahouse4ontopofahill.Alittlegirlnomorethan7yearsoldhoppeddownthebusstepsandstarted5upthedrivewaytowardthehouse.The6onherfacewascontagious有传染性的.Herlonghairwasbouncingoffhershouldersandherpinkbackpackwastrailingbehindher7sheran.Ilookedupthehilltoseewhereshewasgoingandsawherdad8her.Asshegotcloserandcloserherdadsmiledandkneltdownto9her.Thesecondshegottohimhewrappedhis10armsaroundherandgaveherahugehug. Myeyes11abitasIwatchedthis12andrememberedallthetimesmyownchildrenhadrunintomy13withsmilingfacesandlovinghearts.Everysingle14fromthemwasafountainofyouthandatreasureof15.Mylovelytripdownmemorylanewas16whenIheardthecarbehindmehonkitshorn.Isawtheschoolbusquickly17andstartedtofollowitagain.Ididso18withafullerheartandlighter19thanIhadbefore.Itookthatbeautifulmomentandstoreditsafelyinmysoul20Iknewitwouldremainforever. 1A.door B.ears C.heart D.window 2A.discovered B.realized C.looked D.saw 3A.walking B.driving C.arriving D.leaving 4A.sat B.seat C.sitting D.seating 5A.jumping B.dragging C.running D.passing 6A.look B.surprise C.eagerness D.smile 7A.until B.as C.unless D.because 8A.lookingfor B.watchingover C.waitingfor D.signingto 9A.dress B.shelter C.greet D.help 10A.powerful B.steady C.slim D.bare 11A.closed B.opened C.lowered D.watered 12A.event B.scene C.incident D.appointment 13A.room B.sight C.arms D.memory 14A.word B.hug C.gesture D.tear 15A.value B.freedom C.joy D.care 16A.changed B.corrected C.interrupted D.blocked 17A.givingaway B.pullingaway C.walkingaway D.takingaway 18A.however B.therefore C.besides D.instead 19A.sense B.spirit C.state D.burden 20A.where B.what C.which D.that
30分Noneofusgetoutoflifealivesobebraveandbethankfulforalltheopportunities机会youhave.Thosewere1wordssaidby18﹣year﹣oldJakeBaileyacancerpatient. BaileywasintheleadingpositionoftheStudents'Union.Theyoungmanhadplannedto2athishighschool'send﹣of﹣yearceremony典礼onschedule.3justtheweekbeforehereceivedshocking4.Afterseveralweeksofnotfeelingwelltestsshowedthathehadafast﹣growingformofcancer.Doctorssaidwithout5hewouldonlyhaveweekstolivesotheydidn't6himtotakepartintheevent.ButBaileyputonhisschooluniformalongwithhis7faceandlefthishospitalbedtogivetheinspiringspeechtohis8.Withoutdoubthissurpriseappearance9everyoneattheceremony.Sittinginthewheelchairhebeganto10hisideas.Heexpressedthatastrong﹣willedpersonwouldnoteasily11nomatterhowhardlifewas. AtthespeechBaileyencouragedhisschoolmatesto12theirtime.Thefutureistrulyinourhands.13abouthavingimpracticallong﹣termdreams.Let'sbe14toshort﹣termgoalsHe15.Wedon'tknowwherewemightenduporwhenwewillendupsoworkwithprideonwhatis16us. Whenthesenior17hisspeechwiththeschool's18AltioraPetowhichmeansIfightforhigherthingstheentireroomburstintocheers.19Bailey'smessagewasheardloudandclear.Baileythenclosedhiseyesand20thewordsThankyou. 1A.unbelievable B.genuine C.inspiring D.amazing 2A.speak B.chat C.sing D.debate 3A.so B.Instead C.Besides D.However 4A.fault B.attack C.news D.pain 5A.doubt B.hope C.treatment D.delay 6A.persuade B.allow C.warn D.organize 7A.determined B.frightened C.satisfied D.surprised 8A.friends B.family C.schoolmates D.roommates 9A.amused B.shocked C.affected D.frightened 10A.explain B.form C.share D.change 11A.turnup B.givein C.breakup D.cutdown 12A.gain B.treasure C.spend D.spare 13A.Talk B.Forget C.Care D.Dream 14A.devoted B.limited C.admitted D.lost 15A.continued B.reminded C.sighed D.cried 16A.inplaceof B.infrontof C.inchargeof D.insearchof 17A.replaced B.ended C.began D.decorated 18A.motto B.principle C.rule D.opinion 19A.Finally B.Obviously C.Actually D.Entirely 20A.mouthed B.typed C.recorded D.wrote
用如图所示的电路测阻值约500Ω的电阻Rx阻值． 实验器材电源E电动势10V内阻为零定值电阻R0＝450Ω电阻箱R0～9999.9Ω开关S导线若干． 供选择的电流表A1量程1000mA内阻约为50ΩA2量程100mA内阻约为50ΩA3量程10mA内阻约为50Ω． 回答实验过程的问题 1电流表应选用选填“A1”“A2”或“A3” 2按照电路图正确连接电路闭合开关S前应将电阻箱R接入电路的阻值调到选填“最大值”“最小值”或“任意值” 3调节电阻箱R接入电路的阻值读取多组R和对应的电流表示数I．将读取的多组数据记录在设计好的表格中并计算每组数据中的值表格略． 4建立以R/Ω为横轴/A﹣1为纵轴的坐标系并正确描点得到﹣R图线．测得图线延长线在纵轴上的截距数值大小为A﹣1若计算得到图线的斜率大小为0.20Ω•A﹣1则Rx＝Ω．已知所选电流表的内阻RA＝40Ω．
如图甲所示在平行虚线MNPQ间有垂直于纸面的交变磁场两虚线间的距离为d磁场的磁感应强度随时间变化的规律如图乙所示磁场变化的周期为T．一质量为m电荷量为q的带电粒子在虚线MN上的A点以垂直于MN向右射入两虚线间若磁场的磁感应强度B0＝不计粒子的重力则下列说法正确的是
1分﹣Lucyisnotcomingtonight. ﹣Butshe! A.promised B.willpromise C.hadpromised D.promises
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