x2 |
a2 |
y2 |
b2 |
| ||
5 |
A.
| B.5 | C.2
| D.3 |
x |
sin∠PF2F1 |
y |
sin∠PF1F2 |
x | ||||
|
y | ||||
|
2
| ||
5 |
4
| ||
5 |
2
| ||
5 |
c |
a |
5 |
x2 |
a2 |
y2 |
b2 |
A.(1,
| B.(1,
| C.(2,
| D.(,2] |
x2 |
3 |
3 |
2 |
3 |
FP1 |
PF2 |
A.(
| B.(
| C.(2,0) | D.(1,0) |
x2 |
a2 |
y2 |
b2 |
x2 |
a2 |
y2 |
b2 |
3 |
A.y=±
| B.y=±
| C.y=±2x | D.y=±
|
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