x2 |
a2 |
y2 |
8 |
S△AF1O |
S△AEO |
S△CF1O |
S△CEO |
1 |
3 |
1 |
3 |
x02 |
9 |
y02 |
8 |
4 |
9 |
y02 |
8 |
2
| ||
3 |
2
| ||
3 |
2
| ||
3 |
|
18k2 |
8+9k2 |
9(k2-8) |
8+9k2 |
S△AF1O |
S△AEO |
| ||
|
|AF1| |
|AE| |
| ||
|
|x1+1| |
|x1| |
x1+1 |
x1 |
S△CF1O |
S△CEO |
| ||
|
|CF1| |
|CE| |
| ||
|
|1+x2| |
|x2| |
-1-x2 |
-x2 |
1+x2 |
x2 |
x1+1 |
x1 |
1+x2 |
x2 |
x2(1+x1)+x1(1+x2) |
x1x2 |
2x1x2+x1+x2 |
x1x2 |
x1+x2 |
x1x2 |
| ||
|
-2k2 |
k2-8 |
2(k2-8)+16 |
k2-8 |
16 |
k2-8 |
2 |
16 |
k2-8 |
16 |
t |
16 |
t |
1 |
t |
1 |
2 |
3 |
| ||
3 |
x2 |
a2 |
y2 |
b2 |
1 |
4 |
A.
| B.
| C.x2+
| D.
|
x2 |
a2 |
y2 |
b2 |
| ||
2 |
AP |
BP |
1 |
2 |
3 |
| ||
4 |
| ||
2 |
1 |
2 |
F′F |
FP |
F′F |
F′P |
AB |
CD |
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