x2 |
a2 |
y2 |
b2 |
1 |
2 |
6 |
OA |
OB |
c |
a |
1 |
2 |
| ||
|
3 |
3 |
x2 |
4 |
y2 |
3 |
|
1 |
4 |
32k2 |
3+4k2 |
64k2-12 |
3+4k2 |
. |
OA |
OB |
64k2-12 |
3+4k2 |
32k2 |
3+4k2 |
87 |
4k2+3 |
1 |
4 |
87 |
3 |
87 |
4k2+3 |
87 |
4 |
87 |
4k2+3 |
13 |
4 |
OA |
OB |
13 |
4 |
y1+y2 |
x1-x2 |
y1(x1-x2) |
y1+y2 |
2x1x2-4(x1+x2) |
x1+x2-8 |
2×
| ||||
|
x2 |
16 |
MF1 |
MF2 |
A.1 | B.2 | C.2
| D.0 |
a |
b |
a |
b |
a |
b |
A.
| B.1 | C.
| D.
|
x2 |
4 |
x2 |
3 |
2 |
OA |
OB |
1 |
2 |
OA |
OB |
A.-
| B.-
| C.-4 | D.无法确定 |
a |
b |
b |
a |
b |
a |
b |
3 |
a |
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