x2 |
a2 |
y2 |
b2 |
FB1 |
FB2 |
|DP| |
|MN| |
FB1 |
FB2 |
FB1 |
FB2 |
3 |
x2 |
4 |
y2 |
3 |
|
8k2 |
3+4k2 |
4k2-12 |
3+4k2 |
4k2 |
3+4k2 |
-3k |
3+4k2 |
(1+k2)[(x1+x2)2-4x1x2] |
(1+k2)[
|
12(k2+1) |
4k2+3 |
3k |
4k2+3 |
1 |
k |
4k2 |
4k2+3 |
3
| ||
4k2+3 |
|DP| |
|MN| |
| ||||
|
1 |
4 |
|
1 |
4 |
1-
|
1 |
k2+1 |
1 |
4 |
1-
|
1 |
4 |
|DP| |
|MN| |
1 |
4 |
2 |
2 |
AM |
AN |
2 |
x2 |
a2 |
y2 |
b2 |
. |
FA1 |
FA2 |
x2 |
a2 |
y2 |
b2 |
| ||
3 |
1 |
2 |
3 |
OS |
OT |
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