x2 |
a2 |
y2 |
b2 |
| ||
2 |
A.
| B.
| C.
| D.
|
PF 12+PF 2 2-F 1F 2 2 |
2PF 1•PF 2 |
1 |
2 |
x2+y2-4c 2 |
2xy |
OP |
1 |
2 |
PF 1 |
PF 2 |
1 |
4 |
PF 1 |
PF 2 |
3a2 |
4 |
1 |
4 |
c |
a |
1 |
2 |
x2 |
a2 |
y2 |
b2 |
3 |
π |
2 |
A.
| B.
| C.
| D.arccos
|
2 |
x2 |
a2 |
y2 |
9 |
x2 |
a2 |
y2 |
b2 |
A.
| B.
| C.
| D.
|
x2 |
a2 |
y2 |
b2 |
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