x2 |
a2 |
y2 |
b2 |
1 |
2 |
A.(1,
| B.(1,
| C.(
| D.(
|
x2 |
a2 |
y2 |
b2 |
b |
a |
b |
a |
|
a2 |
b2 |
x | 0 |
a2 |
b2 |
1 |
2 |
c2 |
a2 |
c2 |
a2 |
c2 |
a2 |
c |
a |
3 |
c |
a |
3 |
x2 |
a2 |
y2 |
b2 |
A.
| B.
| C.
| D.
|
x2 |
a2 |
y2 |
b2 |
A.(1,+∞) | B.(1,2) | C.(1,1+
| D.(2,1+
|
A.2 | B.
| C.2或
| D.2或
|
x2 |
k-2 |
y2 |
k-1 |
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