x2 |
a2 |
y2 |
b2 |
√6 |
3 |
OA |
OB |
√3 |
2 |
{ |
a= √3 |
x2 |
3 |
{ |
y=kx+1 |
-6k |
1+3k2 |
OA |
OB |
-6k |
1+3k2 |
1-3k2 |
3k2+1 |
√3 |
3 |
|m| |
√1+k2 |
√3 |
2 |
3 |
4 |
-6km |
1+3k2 |
3m2-3 |
1+3k2 |
36k2m2 |
(3k2+1)2 |
12(m2-1) |
3k2+1 |
12(k2+1)(3k2+1-m2) |
(3k2+1)2 |
3(k2+1)(9k2+1) |
(3k2+1)2 |
12k2 |
9k4+6k2+1 |
12 | ||
9k2+
|
12 |
2×3+6 |
1 |
k2 |
√3 |
3 |
√3 |
3 |
1 |
2 |
√3 |
2 |
√3 |
2 |