x |
5 |
y |
3 |
A.|PF1|+|PF2|=10 | B.|PF1|+|PF2|<10 | C.|PF1|+|PF2|≤10 | D.|PF1|+|PF2|≥10 |
x |
5 |
y |
3 |
x2 |
25 |
y2 |
9 |
x2 |
25 |
y2 |
9 |
x |
5 |
y |
3 |
1 |
2 |
1 |
2 |
1 |
2 |
x2 |
25 |
y2 |
9 |
x |
5 |
y |
3 |
x2 |
25 |
y2 |
9 |
x |
5 |
y |
3 |
x2 |
25 |
y2 |
9 |
x |
5 |
y |
3 |
x |
5 |
y |
3 |
x2 |
25 |
y2 |
9 |
π |
2 |
x2 |
25 |
y2 |
9 |
x2 |
25 |
y2 |
9 |
9 |
a |
A.椭圆 | B.线段 | C.椭圆或线段 | D.不存在 |
A.椭圆 | B.双曲线 | C.抛物线 | D.圆 |
y-3 |
x-2 |
y-1 |
x+3 |
x2 |
2+m |
y2 |
m+1 |
A.椭圆 | B.直线 | C.圆 | D.线段 |
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