2 |
2 |
PE |
PF |
PQ |
2 |
MQ |
| ||
2 |
2 |
2 |
PE |
PF |
2 |
2 |
PQ |
2 |
MQ |
2 |
x2 |
2 |
3 |
|m| | ||
|
| ||
2 |
|
4km |
1+2k2 |
2(m2-1) |
1+2k2 |
1+k2 |
(x1+x2)2-4x1x2 |
2 |
| ||
1+2k2 |
2 |
| ||
1+2k2 |
x2 |
a2 |
y2 |
4 |
F1P |
F2P |
A.8-4
| B.4+2
| C.4 | D.8
|
BC |
CA |
A.10 | B.20 | C.-10 | D.-20 |
a |
b |
a |
a |
b |
13 |
b |
a |
b |
a |
a |
b |
A.-4 | B.4 | C.0 | D.9 |
a |
b |
a |
3 |
b |
a |
b |
a |
b |
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