已知椭圆X^2/(a^2)+Y^2/(a^2-1)=1(a>1)的左右焦点F1、F2,抛物线C:y^2=2px,以F2为焦点且与椭圆相交于点M(x1,y1)、N(x2,y2),直线F1M与抛物线c相切(1)求抛物线C的方程和点M、N的坐标(2)求椭圆方
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已知椭圆X^2/(a^2)+Y^2/(a^2-1)=1(a>1)的左右焦点F1、F2,抛物线C:y^2=2px,以F2为焦点且与椭圆相交于点M(x1,y1)、N(x2,y2),直线F1M与抛物线c相切(1)求抛物线C的方程和点M、N的坐标(2)求椭圆方
已知椭圆X^2/(a^2)+Y^2/(a^2-1)=1(a>1)的左右焦点F1、F2,抛物线C:y^2=2px,以F2为焦点且与椭圆相交于点M(x1,y1)、N(x2,y2),直线F1M与抛物线c相切
(1)求抛物线C的方程和点M、N的坐标
(2)求椭圆方程和离心率
已知椭圆X^2/(a^2)+Y^2/(a^2-1)=1(a>1)的左右焦点F1、F2,抛物线C:y^2=2px,以F2为焦点且与椭圆相交于点M(x1,y1)、N(x2,y2),直线F1M与抛物线c相切(1)求抛物线C的方程和点M、N的坐标(2)求椭圆方
(1)椭圆X^2/(a^2)+Y^2/(a^2-1)=1(a>1)
半焦距c=a^2-(a^2-1)=1
F1(-1,0),F2(1,0)
抛物线C:y^2=2px,以F2为焦点,
p/2=1,p=2,
y^2=4x
直线F1M:y=k(x+1),
直线F1M与抛物线c相切,
即方程联立后delt=0
方程联立得ky^2-4y+4k=0
delt=0,k=1 或k=-1
规定M在X轴上方
k=1,解得y=2,x=1,
所以M(1,2),N(1,-2)
(2)M在椭圆上,根据椭圆定义
MF1+MF2=2a
MF1^2=(1+1)^2+2^2=8
MF2^2=0^2+2^2=4
2a=2√2+2,a=√2+1
b^2=a^2-c^2=(√2+1)^2-1=2√2+2
椭圆方程x^2/(3+2√2)+y^2/(2+2√2)=1
e=c/a=1/(√2+1)=√2-1
Attention! ! Whenever those who read this post do not back this generation will not only remain a bachelor,mulberry bags, even my next life, too.
1, you are her first man
2, from the back t...
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Attention! ! Whenever those who read this post do not back this generation will not only remain a bachelor,mulberry bags, even my next life, too.
1, you are her first man
2, from the back to hold you to sleep
3, middle of the night and wake up to cover the quilt for you
4, eat your delicious feed her what you think and feel good
5, do not ask you do not want her to know anything
6, I believe every word you do not expose your lies
7, efforts to adapt to your lifestyle and circle of life
8, friendly to your friends, their friends have as your own
9, in front of your friends to meet you face
10,mac brushes, do you like her to do
11, the hair long
12, control of diet and exercise to keep fit in the slim and change the status of Pacific Princess
13, to help your nails, there is something to make you get rid of the habit of biting
14, she will go all the way for you to buy what you like to eat
15, put away her bad mood, his face wiped away tears, when you only see her smile
16, using a mobile phone point of sweet talk about love songs and give you
17, and you cherish every meeting
18, get up every morning before you are kissing
19, buy cigarettes for you, but only buy a little bit, because smoking is harmful to health
20, allows you to spin in the house behind her back
21, lying in your lap and watch TV with you
22, with bath, wash hair, to help you dry
23, watching a film, learn to style the woman a solution, not the innocent little girl has been
24, she'll leave you with the best food
25, for cleaning your clothes, especially socks
26, to help you clean all the shoes, no matter what you need to wear a pair when they are clean
27, to accompany you to the vegetable market to buy vegetables
28, you do eat the food and praise
29, my father learned to do with his gold medal knuckle of pork braised
30, never shut down, no arrears, to ensure the smooth flow of mobile phones, so you can always find her
31, told his mother, and your story, she has the right to know who put her daughter into a woman
32, according to the photos with you in your wallet
33, daily diary, diary is written inside the things about you
34, pp small books with a note of each of you sent her a text message
35, quietly waiting for you
36, no chat friends, see friends
37, you are happy happy than you, you sad sad than when you
38, truly believe that everything you do is have a point
39, couple photo shoot, made a beautiful save brochure
40, has sent you to every one of her treasures things are good
41, all her friends know your name
42, when your cell phone right away to help you stop payment
43, she will always give you a surprise, like she will suddenly receive mail to package
44, she hates the car, but to see you, she came at you hard all the way to the city
45, because you did not answer her phone while she was anxious, crying, to ask you:
46, often give you the missing cards and E-MAIL
47, no matter how far the road, the annual holiday is to see you
48, when you are sick, pouring water to coax you to take medicine
49, to at least give you a 3 times a
50, will be middle of the night, when suddenly I call you, tell you:
51, secretly pull your clothes angle, to remind you to drink less
52, when you never give up your suffering
53, stand ready to suffer along with you
54, promised to marry you,Mac makeup discount, even if not roses and a ring (if there is such a day)
55, at the time when you no longer love her to leave quietly
where girls could be done any of the above
................................ 20 条 not to marry her time
................................ 30 条 marry her to think about
................................ 40 条 what she would like to marry Oh
................................ 50 条 Pinlelaoming should marry her
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