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1、高中数学_圆锥曲线知识点小结guide sex further enhanced, documents handle and running of speed obviously speed up, program gradually specification, conference service and Chief reception of quality and level has has new of improve, Logistics support capability further strengthened. Document management, confidentia
2、l, confidentiality, duty, letters and other items have been significantly improved. 4, Office construction increased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrough, has developed a series of code of conduct, continuous improve
3、ment of operational mechanism, sound and the implementation of the rules and regulations, and adhere to the system of managing people, according to the rules, the work gradually into the orbit of institutionalization and standardization. Focus on strengthening ideological and political construction
4、of the contingent of cadres, and actively carried out various business training, knowledge of the Office team structure has been optimized, to broaden the range of knowledge and operational capacity grows, nurtured a political firm, sharp, professional and innovative staff, created solidarity, striv
5、ing for the top, pragmatic, dedication, good image. However, with the State Council and the provincial Government of the national, the provinces Secretary-General meeting of government offices under the new situation圆锥曲线知识点小结 一、椭圆:(1)椭圆的定义:平面内与两个定点的距离的和等于常数(大于)的点的轨迹。 F,F|FF|1212其中:两个定点叫做椭圆的焦点，焦点间的距离
6、叫做焦距。 注意:表示椭圆;表示线段;没有轨迹; FF2a,|FF|2a,|FF|2a,|FF|12121212(2)椭圆的标准方程、图象及几何性质: 中心在原点，焦点在轴上 y 中心在原点，焦点在轴上 x2222yxxy ，,1(a,b,0)标准方程 ，,1(a,b,0)2222ababy B2 y PB 2 PF 2 x 图 形 AAA1 2 1 x A2 O FO F2 1 B1 F1 B1 A(,a,0),A(a,0)A(,b,0),A(b,0)1212 顶 点 B(0,b),B(0,b)B(0,a),B(0,a)12122b2ay轴，轴;短轴为，长轴为 x对称轴 F(,c,0),F(
7、c,0) F(0,c),F(0,c) 焦 点 1212222c,a,b焦 距 |FF|,2c(c,0) 12guide sex further enhanced, documents handle and running of speed obviously speed up, program gradually specification, conference service and Chief reception of quality and level has has new of improve, Logistics support capability further streng
8、thened. Document management, confidential, confidentiality, duty, letters and other items have been significantly improved. 4, Office construction increased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrough, has developed a serie
9、s of code of conduct, continuous improvement of operational mechanism, sound and the implementation of the rules and regulations, and adhere to the system of managing people, according to the rules, the work gradually into the orbit of institutionalization and standardization. Focus on strengthening
10、 ideological and political construction of the contingent of cadres, and actively carried out various business training, knowledge of the Office team structure has been optimized, to broaden the range of knowledge and operational capacity grows, nurtured a political firm, sharp, professional and inn
11、ovative staff, created solidarity, striving for the top, pragmatic, dedication, good image. However, with the State Council and the provincial Government of the national, the provinces Secretary-General meeting of government offices under the new situationguide sex further enhanced, documents handle
12、 and running of speed obviously speed up, program gradually specification, conference service and Chief reception of quality and level has has new of improve, Logistics support capability further strengthened. Document management, confidential, confidentiality, duty, letters and other items have bee
13、n significantly improved. 4, Office construction increased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrough, has developed a series of code of conduct, continuous improvement of operational mechanism, sound and the implementatio
14、n of the rules and regulations, and adhere to the system of managing people, according to the rules, the work gradually into the orbit of institutionalization and standardization. Focus on strengthening ideological and political construction of the contingent of cadres, and actively carried out vari
15、ous business training, knowledge of the Office team structure has been optimized, to broaden the range of knowledge and operational capacity grows, nurtured a political firm, sharp, professional and innovative staff, created solidarity, striving for the top, pragmatic, dedication, good image. Howeve
16、r, with the State Council and the provincial Government of the national, the provinces Secretary-General meeting of government offices under the new situationc(离心率越大，椭圆越扁) e,(0,e,1)离心率 a22b通 径 (过焦点且垂直于对称轴的直线夹在椭圆内的线段) a22xy3(常用结论:(1)椭圆的两个焦点为，过的直线交椭圆于两F,FFA,B，,1(a,b,0)12122ab点，则的周长= ,ABF222xy(2)设椭圆左、右
17、两个焦点为，过且垂直于对称轴的直线F,FF，,1(a,b,0)12122ab交椭圆于两点，则的坐标分别是 P,QP,Q|PQ|,二、双曲线: (1)双曲线的定义:平面内与两个定点的距离的差的绝对值等于常数(小于)的点的轨F,F|FF|1212迹。 其中:两个定点叫做双曲线的焦点，焦点间的距离叫做焦距。 注意:与()表示双曲线的一支。 |PF|,|PF|,2a|PF|,|PF|,2a2a,|FF|122112表示两条射线;没有轨迹; 2a,|FF|2a,|FF|1212(2)双曲线的标准方程、图象及几何性质: y中心在原点，焦点在轴上 中心在原点，焦点在x轴上 2222yxyx ,1(a,0,b
18、,0),1(a,0,b,0)标准方程 2222ababstrongly of implementation to hasGramophone, mail room and the Messenger is not confined to paper communications, yinglaisongwang and upload issue. Must ay attention to implementation is the core of government offices, requiring government departments at all levels cannot
19、be ion, pementing in earnest the work of spontaneity, initiative and steadfastness. And explicitly put forward the surrounding situatany circumstances, should always focus on the big picture, firmly grasp the overall situation, increasing in the overall implunder t departments at all levels in the n
20、ew era should be put in the situation to understand, to grasp, to deploy at any time and em of government offices bring new situations and new problems and new challenges, profoundly expounded the work of governmenscientifically analyzed the new situation and the newTasks on the systGeneral of the S
21、tate Council and the provincial government has held a government system, from a global and strategic height, -offices in the city since last season, meeting the Secretaryies, improve quality, and strive to create a new situation of system of government These problems, we must effectively be addresse
22、d in the future work. Second, serve the overall situation, carry out their dut more, active research of less, service also has not timely, and not in place of problem; work in the meet Yu traditional of,ion, promote the implementation of the work. aboraton the County (district) and municipal governm
23、ent sector Office work of guide enough, No real form interaction and close collfull, research results of into degree not high; some sector documents running not specification; Municipal Government Office ough k and promoted decision implementation of contact enough close, feedback situation not acti
24、ve; research resources of using enand program of of work way, develop innovation spirit and service innovation capacity not strong; supervision information worthe functions and priorities compared to the requirements of our gap is still very big. Main is daily in the passive meet of 2 guide sex furt
25、her enhanced, documents handle and running of speed obviously speed up, program gradually specification, conference service and Chief reception of quality and level has has new of improve, Logistics support capability further strengthened. Document management, confidential, confidentiality, duty, le
26、tters and other items have been significantly improved. 4, Office construction increased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrough, has developed a series of code of conduct, continuous improvement of operational mechanis
27、m, sound and the implementation of the rules and regulations, and adhere to the system of managing people, according to the rules, the work gradually into the orbit of institutionalization and standardization. Focus on strengthening ideological and political construction of the contingent of cadres,
28、 and actively carried out various business training, knowledge of the Office team structure has been optimized, to broaden the range of knowledge and operational capacity grows, nurtured a political firm, sharp, professional and innovative staff, created solidarity, striving for the top, pragmatic,
29、dedication, good image. However, with the State Council and the provincial Government of the national, the provinces Secretary-General meeting of government offices under the new situation助飞教育y PF 2 y PB 2 x 图 形 x O O AF2 1 FA2 1 B1 F1 A(,a,0),A(a,0)B(0,a),B(0,a)顶 点 12122b2a轴，轴;虚轴为，实轴为 yx对称轴 F(,c,0)
30、,F(c,0)F(0,c),F(0,c)焦 点 1212222c,a，b焦 距 |FF|,2c(c,0)12c(离心率越大，开口越大) e,(e,1)离心率 abay,xy,x 渐近线 ab22b 通 径 a(3)双曲线的渐近线: 2222xyxyxy?求双曲线的渐近线，可令其右边的1为0，即得，因式分解得到。 ,0,0,12222ababab2222xyxy,1?与双曲线共渐近线的双曲线系方程是; ,2222abab2222(4)等轴双曲线为，其离心率为 x,y,t22yxF,FF(4)常用结论:(1)双曲线的两个焦点为，过的直线交双曲线的,1(a,0,b,0)12122ab,ABF同一支于
31、A,B两点，则的周长= 2General meeting of government offices under the new situation-cial Government of the national, the provinces Secretary, created solidarity, striving for the top, pragmatic, dedication, good image. However, with the State Council and the provinstaffbroaden the range of knowledge and oper
32、ational capacity grows, nurtured a political firm, sharp, professional and innovative of cadres, and actively carried out various business training, knowledge of the Office team structure has been optimized, to Focus on strengthening ideological and political construction of the contingent bit of in
33、stitutionalization and standardization. he rules and regulations, and adhere to the system of managing people, according to the rules, the work gradually into the orn of tough, has developed a series of code of conduct, continuous improvement of operational mechanism, sound and the implementationcre
34、ased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrChief reception of quality and level has has new of improve, Logistics support capability further strengthened. construction i Document management, confidential, confidentiality,
35、duty, letters and other items have been significantly improved. 4, Office ence service andguide sex further enhanced, documents handle and running of speed obviously speed up, program gradually specification, confer3 guide sex further enhanced, documents handle and running of speed obviously speed u
36、p, program gradually specification, conference service and Chief reception of quality and level has has new of improve, Logistics support capability further strengthened. Document management, confidential, confidentiality, duty, letters and other items have been significantly improved. 4, Office con
37、struction increased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrough, has developed a series of code of conduct, continuous improvement of operational mechanism, sound and the implementation of the rules and regulations, and adh
38、ere to the system of managing people, according to the rules, the work gradually into the orbit of institutionalization and standardization. Focus on strengthening ideological and political construction of the contingent of cadres, and actively carried out various business training, knowledge of the
39、 Office team structure has been optimized, to broaden the range of knowledge and operational capacity grows, nurtured a political firm, sharp, professional and innovative staff, created solidarity, striving for the top, pragmatic, dedication, good image. However, with the State Council and the provi
40、ncial Government of the national, the provinces Secretary-General meeting of government offices under the new situation22yx(2)设双曲线左、右两个焦点为，过且垂直于对称轴的F,FF,1(a,0,b,0)12122ab直线交双曲线于两点，则的坐标分别是 P,QP,Q|PQ|,三、抛物线: (1)抛物线的定义:平面内与一个定点的距离和一条定直线的距离相等的点的轨迹。 其中:定点为抛物线的焦点，定直线叫做准线。 (2)抛物线的标准方程、图象及几何性质: p,0轴上， 焦点在轴上
41、， 焦点在yy焦点在轴上， 焦点在轴上， xx 开口向右 开口向左 开口向上 开口向下 2222 y,2px y,2px标准方程 x,2pyx,2pyy y l l y PP l y O x x Px 图 形 FFx O O FF P O l O(0,0)顶 点 y轴 对称轴 轴 xpppp F(,0)F(0,)F(0,)F(,0)焦 点 2222e,1离心率 pppp x,x,y,y,准 线 22222p 通 径 pp |PF,x，|PF,y，焦半径 0022strongly of implementation to hasGramophone, mail room and the Mess
42、enger is not confined to paper communications, yinglaisongwang and upload issue. Must ay attention to implementation is the core of government offices, requiring government departments at all levels cannot be ion, pementing in earnest the work of spontaneity, initiative and steadfastness. And explic
43、itly put forward the surrounding situatany circumstances, should always focus on the big picture, firmly grasp the overall situation, increasing in the overall implunder ough t departments at all levels in the new era should be put in the situation to understand, to grasp, to deploy at any time and
44、em of government offices bring new situations and new problems and new challenges, profoundly expounded the work of governmenscientifically analyzed the new situation and the newTasks on the systGeneral of the State Council and the provincial government has held a government system, from a global an
45、d strategic height, -offices in the city since last season, meeting the Secretaryies, improve quality, and strive to create a new situation of system of government These problems, we must effectively be addressed in the future work. Second, serve the overall situation, carry out their dut k and prom
46、oted decision implementation of contact enough close, feedback situation not active; research resources of using enion, promote the implementation of the work. aboraton the County (district) and municipal government sector Office work of guide enough, No real form interaction and close collfull, res
47、earch results of into degree not high; some sector documents running not specification; Municipal Government Office and program of of work way, develop innovation spirit and service innovation capacity not strong; supervision information wor more, active research of less, service also has not timely
48、, and not in place of problem; work in the meet Yu traditional of,the functions and priorities compared to the requirements of our gap is still very big. Main is daily in the passive meet of 4 guide sex further enhanced, documents handle and running of speed obviously speed up, program gradually spe
49、cification, conference service and Chief reception of quality and level has has new of improve, Logistics support capability further strengthened. Document management, confidential, confidentiality, duty, letters and other items have been significantly improved. 4, Office construction increased at all levels. City Government offices adhere to strengthen and improve the construction of the system as a breakthrough, h