x2 |
a2 |
y2 |
b2 |
π |
2 |
3 |
b2 |
a |
b2 |
-ac |
b |
a |
b2 |
ac |
b |
a |
2 |
c |
a |
| ||
2 |
|F1Q|2+|F2Q|2-|F1F2|2 |
2|F1Q||F2Q| |
4a2-4c2-2|F1Q||F2Q| |
2|F1Q||F2Q| |
2b2 |
|F1Q||F2Q| |
|F1Q|+|F2Q| |
2 |
2b2 |
a2 |
2c2 |
2c2 |
π |
2 |
a |
b |
2 |
(1-
| ||||
a2 |
y2 |
b2 |
2 |
2
| ||
5 |
2c2 |
5 |
2
| ||
5 |
8c2 |
5 |
48c2 |
25 |
1 |
2 |
4
| ||
5 |
3 |
x2 |
50 |
y2 |
25 |
y |
x-1 |
A.5 | B.
| C.
| D.
|
3 |
x2 |
m2 |
A.
| B.
| C.
| D.
|
x2 |
2 |
y | 2 |
A.(-
| B.(
| C.(-
| D.(
|
x2 |
a2 |
y2 |
b2 |
4 |
3 |
14 |
3 |
© 2017-2019 超级试练试题库,All Rights Reserved.