x2 |
a2 |
y2 |
b2 |
PQ |
F1O |
F1Q |
| ||
|
|
| ||
|
|
x2 |
a2 |
y2 |
b2 |
PQ |
F1O |
a2 |
c |
F1Q |
| ||
|
|
| ||
|
|
∥ |
. |
PF2 |
PQ |
2a-2c |
2c |
| ||
2 |
| ||
2 |
x2 |
a2 |
y2 |
b2 |
PQ |
F1O |
a2 |
c |
F1Q |
| ||
|
|
| ||
|
|
a2 |
c |
a2 |
c |
y | ||
|
y | ||
|
y | ||
|
2tan∠QF1O |
1-tan 2∠QF1O |
y | ||
|
2×
| ||||
1-(
|
x2 |
a2 |
y2 |
b2 |
a2 |
c |
a4 |
c2 |
4c4 |
a2 |
| ||
2 |
| ||
2 |
a |
b |
a |
b |
a |
b |
a |
b |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
BC |
BD |
CA |
CE |
AD |
BE |
OA |
a |
OB |
b |
OC |
c, |
OD |
d |
a |
c |
b |
d |
3 |
OM |
ON |
π |
2 |
π |
6 |
a |
π |
6 |
π |
6 |
b |
π |
6 |
π |
6 |
b |
a |
b |
a |
b |
m |
t |
a |
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