高中數(shù)學(xué)-圓錐曲線知識點小結(jié)

高中數(shù)學(xué)_圓錐曲線知識點小結(jié)guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituation《圓錐曲線》知識點小結(jié)一、橢圓:(1)橢圓的定義:平面內(nèi)與兩個定點的距離的和等于常數(shù)(大于)的點的軌跡。F,F|FF|1212其中:兩個定點叫做橢圓的焦點，焦點間的距離叫做焦距。注意:表示橢圓;表示線段;沒有軌跡;FF2a,|FF|2a,|FF|2a,|FF|12121212(2)橢圓的標(biāo)準(zhǔn)方程、圖象及幾何性質(zhì):中心在原點，焦點在軸上y中心在原點，焦點在軸上x2222yxxy，,1(a,b,0)標(biāo)準(zhǔn)方程，,1(a,b,0)2222ababyB2yPB2PF2x圖形AAA121xA2OFOF21B1F1B1A(,a,0),A(a,0)A(,b,0),A(b,0)1212頂點B(0,,b),B(0,b)B(0,,a),B(0,a)12122b2ay軸，軸;短軸為，長軸為x對稱軸F(,c,0),F(c,0)F(0,,c),F(0,c)焦點1212222c,a,b焦距|FF|,2c(c,0)12guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituationguidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituationc(離心率越大，橢圓越扁)e,(0,e,1)離心率a22b通徑(過焦點且垂直于對稱軸的直線夾在橢圓內(nèi)的線段)a22xy3(常用結(jié)論:(1)橢圓的兩個焦點為，過的直線交橢圓于兩F,FFA,B，,1(a,b,0)12122ab點，則的周長=,ABF222xy(2)設(shè)橢圓左、右兩個焦點為，過且垂直于對稱軸的直線F,FF，,1(a,b,0)12122ab交橢圓于兩點，則的坐標(biāo)分別是P,QP,Q|PQ|,二、雙曲線:(1)雙曲線的定義:平面內(nèi)與兩個定點的距離的差的絕對值等于常數(shù)(小于)的點的軌F,F|FF|1212跡。其中:兩個定點叫做雙曲線的焦點，焦點間的距離叫做焦距。注意:與()表示雙曲線的一支。|PF|,|PF|,2a|PF|,|PF|,2a2a,|FF|122112表示兩條射線;沒有軌跡;2a,|FF|2a,|FF|1212(2)雙曲線的標(biāo)準(zhǔn)方程、圖象及幾何性質(zhì):y中心在原點，焦點在軸上中心在原點，焦點在x軸上2222yxyx,,1(a,0,b,0),,1(a,0,b,0)標(biāo)準(zhǔn)方程2222ababstronglyofimplementationtohasGramophone","mailroom"and"theMessenger"isnotconfinedtopapercommunications,yinglaisongwanganduploadissue.Mustayattentiontoimplementation"isthecoreofgovernmentoffices,requiringgovernmentdepartmentsatalllevelscannotbe"ion,pementinginearnesttheworkofspontaneity,initiativeandsteadfastness.Andexplicitlyputforwardthe"surroundingsituatanycircumstances,shouldalwaysfocusonthebigpicture,firmlygrasptheoverallsituation,increasingintheoverallimplundertdepartmentsatalllevelsinthenewerashouldbeputinthesituationtounderstand,tograsp,todeployatanytimeandemofgovernmentofficesbringnewsituationsandnewproblemsandnewchallenges,profoundlyexpoundedtheworkofgovernmenscientificallyanalyzedthenewsituationandthenewTasksonthesystGeneraloftheStateCouncilandtheprovincialgovernmenthasheldagovernmentsystem,fromaglobalandstrategicheight,-officesinthecitysincelastseason,meetingtheSecretaryies,improvequality,andstrivetocreateanewsituationofsystemofgovernmentTheseproblems,wemusteffectivelybeaddressedinthefuturework.Second,servetheoverallsituation,carryouttheirdutmore,activeresearchofless,servicealsohasnottimely,andnotinplaceofproblem;workinthemeetYutraditionalof,ion,promotetheimplementationofthework.aboratontheCounty(district)andmunicipalgovernmentsectorOfficeworkofguideenough,Norealforminteractionandclosecollfull,researchresultsofintodegreenothigh;somesectordocumentsrunningnotspecification;MunicipalGovernmentOfficeoughkandpromoteddecisionimplementationofcontactenoughclose,feedbacksituationnotactive;researchresourcesofusingenandprogramofofworkway,developinnovationspiritandserviceinnovationcapacitynotstrong;supervisioninformationworthefunctionsandprioritiescomparedtotherequirementsofourgapisstillverybig.Mainisdailyinthepassivemeetof2guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituation助飛教育yPF2yPB2x圖形xOOAF21FA21B1F1A(,a,0),A(a,0)B(0,,a),B(0,a)頂點12122b2a軸，軸;虛軸為，實軸為yx對稱軸F(,c,0),F(c,0)F(0,,c),F(0,c)焦點1212222c,a，b焦距|FF|,2c(c,0)12c(離心率越大，開口越大)e,(e,1)離心率abay,,xy,,x漸近線ab22b通徑a(3)雙曲線的漸近線:2222xyxyxy?求雙曲線的漸近線，可令其右邊的1為0，即得，因式分解得到。,,0,,0,,12222ababab2222xyxy,,1?與雙曲線共漸近線的雙曲線系方程是;,,,2222abab2222(4)等軸雙曲線為，其離心率為x,y,t22yxF,FF(4)常用結(jié)論:(1)雙曲線的兩個焦點為，過的直線交雙曲線的,,1(a,0,b,0)12122ab,ABF同一支于A,B兩點，則的周長=2Generalmeetingofgovernmentofficesunderthenewsituation-cialGovernmentofthenational,theprovince'sSecretary,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovinstaffbroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativeofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,toFocusonstrengtheningideologicalandpoliticalconstructionofthecontingentbitofinstitutionalizationandstandardization.herulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheornoftough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationcreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.constructioniDocumentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeenceserviceandguidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,confer3guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituation22yx(2)設(shè)雙曲線左、右兩個焦點為，過且垂直于對稱軸的F,FF,,1(a,0,b,0)12122ab直線交雙曲線于兩點，則的坐標(biāo)分別是P,QP,Q|PQ|,三、拋物線:(1)拋物線的定義:平面內(nèi)與一個定點的距離和一條定直線的距離相等的點的軌跡。其中:定點為拋物線的焦點，定直線叫做準(zhǔn)線。(2)拋物線的標(biāo)準(zhǔn)方程、圖象及幾何性質(zhì):p,0軸上，焦點在軸上，焦點在yy焦點在軸上，焦點在軸上，xx開口向右開口向左開口向上開口向下2222y,,2pxy,2px標(biāo)準(zhǔn)方程x,2pyx,,2pyyyllyPPlyOxxPx圖形FFxOOFFPOlO(0,0)頂點y軸對稱軸軸xppppF(,0)F(0,)F(0,,)F(,,0)焦點2222e,1離心率ppppx,x,,y,y,,準(zhǔn)線22222p通徑pp||||PF,x，||||PF,y，焦半徑0022stronglyofimplementationtohasGramophone","mailroom"and"theMessenger"isnotconfinedtopapercommunications,yinglaisongwanganduploadissue.Mustayattentiontoimplementation"isthecoreofgovernmentoffices,requiringgovernmentdepartmentsatalllevelscannotbe"ion,pementinginearnesttheworkofspontaneity,initiativeandsteadfastness.Andexplicitlyputforwardthe"surroundingsituatanycircumstances,shouldalwaysfocusonthebigpicture,firmlygrasptheoverallsituation,increasingintheoverallimplunderoughtdepartmentsatalllevelsinthenewerashouldbeputinthesituationtounderstand,tograsp,todeployatanytimeandemofgovernmentofficesbringnewsituationsandnewproblemsandnewchallenges,profoundlyexpoundedtheworkofgovernmenscientificallyanalyzedthenewsituationandthenewTasksonthesystGeneraloftheStateCouncilandtheprovincialgovernmenthasheldagovernmentsystem,fromaglobalandstrategicheight,-officesinthecitysincelastseason,meetingtheSecretaryies,improvequality,andstrivetocreateanewsituationofsystemofgovernmentTheseproblems,wemusteffectivelybeaddressedinthefuturework.Second,servetheoverallsituation,carryouttheirdutkandpromoteddecisionimplementationofcontactenoughclose,feedbacksituationnotactive;researchresourcesofusingenion,promotetheimplementationofthework.aboratontheCounty(district)andmunicipalgovernmentsectorOfficeworkofguideenough,Norealforminteractionandclosecollfull,researchresultsofintodegreenothigh;somesectordocumentsrunningnotspecification;MunicipalGovernmentOfficeandprogramofofworkway,developinnovationspiritandserviceinnovationcapacitynotstrong;supervisioninformationwormore,activeresearchofless,servicealsohasnottimely,andnotinplaceofproblem;workinthemeetYutraditionalof,thefunctionsandprioritiescomparedtotherequirementsofourgapisstillverybig.Mainisdailyinthepassivemeetof4guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituation助飛教育焦點弦p焦準(zhǔn)距,2222四、弦長公式:|AB|,1，k|x,x|,1，k,(x，x),4xx,1，k,121212|A|其中,分別是聯(lián)立直線方程和圓錐曲線方程,消去y后所得關(guān)于x的一元二次方程A,,2的判別式和的系數(shù)x求弦長步驟:(1)求出或設(shè)出直線與圓錐曲線方程;(2)聯(lián)立兩方程，消去y,得關(guān)于x的一元二B2x，x,,次方程設(shè)，，由韋達定理求出，A(x,y)B(x,y)Ax，Bx，C,0,121122ACxx,;(3)代入弦長公式計算。12A2法(二)若是聯(lián)立兩方程，消去x,得關(guān)于y的一元二次方程則相應(yīng)的弦長公Ay，By，C,0,111,2222式是:|AB|,1，()|y,y|,1，(),(y，y),4yy,1，(),121212kkk|A|,2注意(1)上面用到了關(guān)系式|x,x|,(x，x),4xx,和121212|A|,2y,y,(y，y),4yy,121212|A|注意(2)求與弦長有關(guān)的三角形面積，往往先求弦長，再求這邊上的高(點到直線的距離)，但若三角形被過頂點的一條線段分成兩個三角形，且線段的長度為定值，求面積一般用分割法五、弦的中點坐標(biāo)的求法法(一):(1)求出或設(shè)出直線與圓錐曲線方程;(2)聯(lián)立兩方程，消去y,得關(guān)于x的一元二次B2x，x,,A(x,y)B(x,y)方程設(shè)，，由韋達定理求出;(3)設(shè)中Ax，Bx，C,0,121122AGeneralmeetingofgovernmentofficesunderthenewsituation-cialGovernmentofthenational,theprovince'sSecretary,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovinstaffbroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativeofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,toFocusonstrengtheningideologicalandpoliticalconstructionofthecontingentbitofinstitutionalizationandstandardization.herulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheornoftough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationcreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.constructioniDocumentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeenceserviceandguidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,confer5guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituationx，x12x,點，由中點坐標(biāo)公式得;再把代入直線方程求出。M(x,y)x,xy,y000002法(二):用點差法，設(shè)，，中點，由點在曲線上，線段的中M(x,y)A(x,y)B(x,y)001122點坐標(biāo)公式，過A、B兩點斜率公式，列出5個方程，通過相減，代入等變形，求出。x,y00六、求離心率的常用方法:法一，分別求出a,c，再代入公式法二、建立a,b,c滿足的關(guān)系，消去b,再化為關(guān)于e的方程，最后解方程求e(求e時，要注意橢圓離心率取值范圍是0，e，1，而雙曲線離心率取值范圍是e，1)22上的任一點，定點D的坐標(biāo)為(8，0)，若點M滿足例1:設(shè)點P是圓xy，,4,,,,,,,,,,(當(dāng)點P在圓上運動時，求點M的軌跡方程(PMMD,2,,,,,,,,,,xy,xy,解設(shè)點M的坐標(biāo)為，點P的坐標(biāo)為，由，PMMD,2，，，，00xxyyxy,,,,,,28,xx,,316yy,3得，即，(，，，，000022222231634xy,，,xy,因為點P在圓上，所以(即，xy，,4xy，,4，，，，，，00002164,,2即，這就是動點M的軌跡方程(xy,，,,,39,,53(,),例2:已知橢圓的兩個焦點為(-2，0)，(2,0)且過點，求橢圓的標(biāo)準(zhǔn)方程2222xy，,,,1(0)abx解法1因為橢圓的焦點在軸上，所以設(shè)它的標(biāo)準(zhǔn)方程為，22ab535322222(20(20210a,，，,,，,，,,,)())()由橢圓的定義可知:2222stronglyofimplementationtohasGramophone","mailroom"and"theMessenger"isnotconfinedtopapercommunications,yinglaisongwanganduploadissue.Mustayattentiontoimplementation"isthecoreofgovernmentoffices,requiringgovernmentdepartmentsatalllevelscannotbe"ion,pementinginearnesttheworkofspontaneity,initiativeandsteadfastness.Andexplicitlyputforwardthe"surroundingsituatanycircumstances,shouldalwaysfocusonthebigpicture,firmlygrasptheoverallsituation,increasingintheoverallimplundertdepartmentsatalllevelsinthenewerashouldbeputinthesituationtounderstand,tograsp,todeployatanytimeandemofgovernmentofficesbringnewsituationsandnewproblemsandnewchallenges,profoundlyexpoundedtheworkofgovernmenscientificallyanalyzedthenewsituationandthenewTasksonthesystGeneraloftheStateCouncilandtheprovincialgovernmenthasheldagovernmentsystem,fromaglobalandstrategicheight,-officesinthecitysincelastseason,meetingtheSecretaryies,improvequality,andstrivetocreateanewsituationofsystemofgovernmentTheseproblems,wemusteffectivelybeaddressedinthefuturework.Second,servetheoverallsituation,carryouttheirdutmore,activeresearchofless,servicealsohasnottimely,andnotinplaceofproblem;workinthemeetYutraditionalof,ion,promotetheimplementationofthework.aboratontheCounty(district)andmunicipalgovernmentsectorOfficeworkofguideenough,Norealforminteractionandclosecollfull,researchresultsofintodegreenothigh;somesectordocumentsrunningnotspecification;MunicipalGovernmentOfficeoughkandpromoteddecisionimplementationofcontactenoughclose,feedbacksituationnotactive;researchresourcesofusingenandprogramofofworkway,developinnovationspiritandserviceinnovationcapacitynotstrong;supervisioninformationworthefunctionsandprioritiescomparedtotherequirementsofourgapisstillverybig.Mainisdailyinthepassivemeetof6guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituation助飛教育22xy222？,a10又所以所求的標(biāo)準(zhǔn)方程為，,1cbac,？,,,2,610622xy2222解法2，所以可設(shè)所求的方程為，,1，將？cbaca,？,,,,2,422aa,422xy53(,),a,10，,1點代人解得:所以所求的標(biāo)準(zhǔn)方程為22106例3.例4.constructioniGeneralmeetingofgovernmentofficesunderthenewsituation-cialGovernmentofthenational,theprovince'sSecretary,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovinstaffbroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativeofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,toFocusonstrengtheningideologicalandpoliticalconstructionofthecontingentbitofinstitutionalizationandstandardization.herulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheornoftough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationcreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrDocumentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,OfficeChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.enceserviceandguidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,confer7guidesexfurtherenhanced,documentshandleandrunningofspeedobviouslyspeedup,programgraduallyspecification,conferenceserviceandChiefreceptionofqualityandlevelhashasnewofimprove,Logisticssupportcapabilityfurtherstrengthened.Documentmanagement,confidential,confidentiality,duty,lettersandotheritemshavebeensignificantlyimproved.4,Officeconstructionincreasedatalllevels.CityGovernmentofficesadheretostrengthenandimprovetheconstructionofthesystemasabreakthrough,hasdevelopedaseriesofcodeofconduct,continuousimprovementofoperationalmechanism,soundandtheimplementationoftherulesandregulations,andadheretothesystemofmanagingpeople,accordingtotherules,theworkgraduallyintotheorbitofinstitutionalizationandstandardization.Focusonstrengtheningideologicalandpoliticalconstructionofthecontingentofcadres,andactivelycarriedoutvariousbusinesstraining,knowledgeoftheOfficeteamstructurehasbeenoptimized,tobroadentherangeofknowledgeandoperationalcapacitygrows,nurturedapoliticalfirm,sharp,professionalandinnovativestaff,createdsolidarity,strivingforthetop,pragmatic,dedication,goodimage.However,withtheStateCouncilandtheprovincialGovernmentofthenational,theprovince'sSecretary-Generalmeetingofgovernmentofficesunderthenewsituation習(xí)題:1(已知橢圓長半軸與短半軸之比是5:3，焦距是8，焦點在x軸上，則此橢圓的標(biāo)準(zhǔn)方程是()22222222xyxyxyxy(A)，,1(B)，,1(C)，,1(D)，,139525525392(以橢圓短軸為直徑的圓經(jīng)過此橢圓的焦點，則橢圓的離心率是()2133(A)(B)(C)(D)2223223.已知橢圓x，2y,m，則下列與m無關(guān)的是()(A)焦點坐標(biāo)(B)準(zhǔn)線方程(C)焦距(D)離心率3224.橢圓mx，y,1的離心率是，則它的長半軸的長是()21(A)1(B)1或2(C)2(D)或125橢圓的中心為O，左焦點為F，P是橢圓上一點，已知?PFO為正三角形，則P點到11右準(zhǔn)線的距離與長半軸的長之比是()333(A),1(B)3,(C)(D)122yx,6.若橢圓=1的準(zhǔn)線平行于y軸，則m的取值范圍是。3m12m，7(橢圓的長半軸是短半軸的3倍，過左焦點傾斜角為30?的弦長為2則此橢圓的標(biāo)準(zhǔn)方程是。8.橢圓的中心在原點，焦點在x軸上，若橢圓的一個焦點將長軸分成的兩段的比例中項等stronglyofimplementationtohasGramophone","mailroom"and"theMessenger"isnotconfinedtopapercommunications,yinglaisongwanganduploadissue.Mustayattentiontoimplementation"isthecoreofgovernmentoffices,requiringgovernmentdepartmentsatalllevelscannotbe"ion,pemen