x2 |
12 |
y2 |
16 |
A.y2-
| B.
| ||||||||
C.
| D.
|
x2 |
12 |
y2 |
16 |
c |
a |
1 |
2 |
x2 |
12 |
y2 |
16 |
x2 |
3 |
x2 |
12 |
y2 |
9 |
x2 |
4 |
y2 |
k |
A.(0,4) | B.(-12,0) | C.(0,2
| D.(0,12) |
A.(-∞,0]∪[1,+∞) | B.(-∞,0)∪(1,+∞) | C.(-∞,-1)∪[1,+∞) | D.(-∞,-1)∪(0,+∞) |
x2 |
a2 |
y2 |
b2 |
A.y=±
| B.y=±3x | C.y=±
| D.y=±9x |
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