x2 |
a2 |
y2 |
5-a2 |
A.(
| B.(
| C.(1,
| D.(5,5
|
b |
a |
c |
a |
|
1+(
|
5 |
10 |
5 |
10 |
2 |
10 |
x2 |
cos2010° |
y2 |
sin2010° |
A.焦点在x轴上的椭圆 | B.焦点在y轴上的椭圆 |
C.焦点在x轴上的双曲线 | D.焦点在y轴上的双曲线 |
x2 |
a2 |
y2 |
b2 |
A.2 | B.
| C.
| D.
|
x2 |
4 |
y2 |
5 |
PF1 |
PF2 |
A.24 | B.48 | C.50 | D.56 |
3 |
A.x2-
| B.
| C.
| D.
|
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