x2 |
a2 |
y2 |
b2 |
PF1 |
PF2 |
a2-b2 |
A.[
| B.[
| C.[
| D.[
|
x2 |
a2 |
y2 |
b2 |
a2 (b2-y2) |
b2 |
PF1 |
PF2 |
PF1 |
•PF2 |
a2 (b2-y2) |
b2 |
c2y2 |
b2 |
PF1 |
•PF2 |
2 |
1 |
2 |
| ||
2 |
1 |
2 |
| ||
2 |
x2 |
36 |
y2 |
9 |
x2 |
a2 |
y2 |
b2 |
|OH| |
|FA| |
A.2 | B.3 | C.4 | D.不能确定 |
x2 |
100 |
y2 |
36 |
x2 |
8 |
y2 |
4 |
A.x=±4 | B.x=±
| C.y=±4 | D.y=±
|
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