y2 |
2 |
MF1 |
MF2 |
MF1 |
MF2 |
F1F2 |
3 |
MF1 |
MF2 |
MF1 |
MF2 |
F1F2 |
MF1 |
MF2 |
MF1 |
MF2 |
1 |
2 |
1 |
2 |
|MF1||MF2| |
|F1F2| |
4 | ||
2
|
2
| ||
3 |
2
| ||
3 |
x2 |
9 |
y2 |
7 |
x2 |
a2 |
y2 |
b2 |
A.
| B.
| C.2 | D.3 |
x2 |
a2 |
y2 |
b2 |
3a |
2 |
A.(1,2) | B.(2,+∞) | C.(1,5) | D.(5,+∞) |
A.
| B.2 | C.
| D.
|
y2 |
4 |
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