x2 |
9 |
y2 |
4 |
A.2 | B.3 | C.4 | D.6 |
x2 |
9 |
y2 |
4 |
A.
| B.1 | C.2 | D.4 |
x2 |
a2 |
y2 |
b2 |
A.C2的方程为
| ||||
B.C1、C2的离心率的和是1 | ||||
C.C1、C2的离心率的积是1 | ||||
D.短轴长等于虚轴长 |
x2 |
6 |
y2 |
5 |
A.5x-3y-13=0 | B.5x+3y-13=0 | C.5x-3y+13=0 | D.5x+3y+13=0 |
x2 |
16 |
y2 |
9 |
A.3+2
| B.4+2
| C.6+2
| D.8+2
|
A.2
| B.
| C.2
| D.
|
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