3 |
3 |
PE |
QE |
3 |
| ||
3 |
b |
c |
x2 |
4 |
y2 |
1 |
8k2 |
1+4k2 |
4k2- 4 |
1+4k2 |
PE |
QE |
4k2- 4 |
1+4k2 |
8k2 |
1+4k2 |
(4m2-8m+1)k2+(m2-4) |
1+4k2 |
4m2-8m+1 |
m2-4 |
17 |
8 |
A.
| B.
| C.
| D.
|
| ||
2 |
16 |
5 |
2 |
x2 |
m+4 |
y2 |
9 |
9 |
2 |
x2 |
9 |
y2 |
4 |
|PF1| |
|PF2| |
A.2 | B.
| C.
| D.2或
|
x2 |
25 |
y2 |
12 |
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