x2 |
a2 |
y2 |
b2 |
A.
| B.
| C.
| D.
|
b(sinβ-sinα) |
a(cosβ-cosα) |
b(sinβ+sinα) |
a(cosβ+cosα) |
b2(sin2β-sin2α) |
a2(cos2β-cos2α) |
b2 |
a2 |
|k1k2| |
2b |
a |
2b |
a |
| ||
2 |
x2 |
a2 |
y2 |
b2 |
x2 |
8 |
y2 |
4 |
x2 |
a2 |
y2 |
b2 |
PF1 |
PF2 |
x2 |
a2 |
y2 |
b2 |
A.(0,1) | B.(0,
| C.[
| D.[
|
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