c |
2d |
1 |
3 |
1 |
d |
1 |
2 |
1 |
6 |
1 |
2d |
1 |
4 |
c |
2d |
1 |
6 |
1 |
2 |
1 |
6 |
1 |
2 |
A.[5,10] | B.(5,10) | C.[3,12] | D.(3,12) |
A.(-∞,-8)∪(1,+∞) | B.(-1,8) | C.(-8,1) | D.(-∞,-1)∪(8,+∞) |
|
|
A.|PF1|+|PF2|=10 | B.|PF1|+|PF2|<10 | C.|PF1|+|PF2|≤10 | D.|PF1|+|PF2|>10 |
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