2 |
OC |
OD |
x2 |
a2 |
y2 |
b2 |
2 |
|
x2 |
8 |
y2 |
4 |
|
(x1+x2)(x1-x2) |
8 |
(y1+y2)(y1-y2) |
4 |
y1-y2 |
x1-x2 |
4 |
8 |
x1+x2 |
y1+y2 |
x |
2y |
x |
2y |
y |
x-1 |
|
|
OC |
OD |
2m2-8 |
1+2k2 |
m2-8k2 |
1+2k2 |
3m2-8 |
8 |
|m| | ||
|
m2 |
1+k2 |
m2 | ||
1+
|
8 |
3 |
2
| ||
3 |
A.抛物线 | B.圆 | C.椭圆 | D.一条直线 |
HP |
PM |
PM |
3 |
2 |
MQ |
© 2017-2019 超级试练试题库,All Rights Reserved.