x2 |
a2 |
y2 |
b2 |
7 |
25 |
7 |
25 |
7 |
25 |
4 |
5 |
b |
a |
4 |
5 |
3 |
5 |
c |
a |
b2 |
a2 |
b |
c |
bc |
a2 |
bc |
a2 |
12 |
25 |
12 |
25 |
x2 |
a2 |
y2 |
b2 |
b+c |
a |
A.(1,+∞) | B.(
| C.(1,
| D.(1,
|
x2 |
25 |
y2 |
9 |
A.4 | B.2 | C.8 | D.
|
x2 |
25 |
y2 |
9 |
A.1 | B.2 | C.3 | D.4 |
x2 |
4 |
y2 |
3 |
PF1 |
PF2 |
5 |
2 |
PF1 |
PF2 |
A.2 | B.3 | C.
| D.
|
x2 |
16 |
y2 |
12 |
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