x2 |
2 |
OM |
OA |
OB |
x12 |
2 |
x22 |
2 |
OM |
OA |
OB |
|
(x1cosθ+x2sinθ)2 |
2 |
x12 |
2 |
x22 |
2 |
x1x2 |
2 |
x1x2 |
2 |
y1y2 |
x1x2 |
1 |
2 |
1 |
2 |
FA |
FB |
FC |
FA |
FB |
FC |
x2 |
a2 |
y2 |
b2 |
PQ |
F1O |
F1Q |
| ||
|
|
| ||
|
|
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 |
© 2017-2019 超级试练试题库,All Rights Reserved.