x2 |
2 |
4
| ||
3 |
x2 |
2 |
2b2 |
a |
2 |
|
4k2 |
1+2k2 |
2k2-2 |
1+2k2 |
1+k2 |
(
|
1+k2 |
1+2k2 |
8 |
4
| ||
3 |
1 | ||
|
| ||
2 |
1 |
2 |
4
| ||
3 |
| ||
2 |
2 |
3 |
| ||
2 |
3 |
x2 |
3 |
A.1个 | B.2个 | C.1个或2个 | D.1个或0个 |
x2 |
4 |
y2 |
3 |
x2+y2-4x+6y+13 |
x2+y2+6x+4y+13 |
26 |
y-1 |
x-3 |
A.(-∞,
| B.(-∞,
| C.[
| D.[
|
x2 |
2 |
1 |
2 |
1 |
2 |
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