2 |
3 |
4 |
3 |
x2 |
a2 |
y2 |
b2 |
2 |
3 |
4 |
3 |
1 |
2 |
2 |
3 |
4 |
3 |
| ||
4 |
| ||
b2 |
x2 |
4 |
y2 |
2 |
2 |
-2k±
| ||
2k2+1 |
2
| ||
2k2+1 |
1+k2 |
2
| ||
2k2+1 |
8(1+k2)(4k2+1) |
(2k2+1)2 |
k2 |
4k4+4k2+1 |
1 | ||
4k2+
|
1 |
k2 |
4k2•
|
| ||
2 |
1 | ||
4k2+
|
2 |
2 |
x2 |
m |
y 2 |
n |
x2 |
a |
y 2 |
b |
A.m-a | B.
| C.m2-a2 | D.
|
A.椭圆 | B.双曲线 | C.拋物线 | D.圆 |
3 |
1 |
p |
1 |
q |
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