1 |
2 |
2 |
1 |
2 |
y |
x+2 |
y |
x-2 |
1 |
2 |
x2 |
4 |
y2 |
2 |
2 |
x2 |
4 |
y2 |
2 |
m |
k |
m |
2k |
m |
2 |
|
4mk |
1+2k2 |
2m2-4 |
1+2k2 |
4mk |
1+2k2 |
m |
k |
1 |
2 |
| ||
2 |
1+k2 |
1+
|
(x1+x2)2-4x1x2 |
|
2m2-4(m2-2) |
3(4-m2) |
|
| ||
|
| ||
3 |
1 |
2 |
1 |
2 |
3(4-m2) |
| ||
3 |
| ||
2 |
4-m2 |
| ||
2 |
(4-m2)m2 |
| ||
2 |
4-m2+m2) |
2 |
2 |
2 |
| ||
2 |
2 |
x2 |
3 |
y2 |
2 |
16 |
11 |
3 |
1 |
2 |
|AB| |
25 |
4 |
A.a=1 | B.0<a<1 | C.a>1 | D.a≥1 |
1 |
3 |
7 |
2 |
x2 |
9 |
A.0 | B.1 | C.2 | D.4 |
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