|x| |
a |
|y| |
b |
5 |
2
| ||
3 |
|
x2 |
5 |
y2 |
4 |
|
x | 2A |
20 |
4+5k2 |
y | 2A |
20k2 |
4+5k2 |
x | 2A |
y | 2A |
20 |
4+5k2 |
20k2 |
4+5k2 |
20(1+k2) |
4+5k2 |
20(1+k2) |
4+5k2 |
1 |
k |
x |
y |
20(1+
| ||
4+5•
|
20(x2+y2) |
4y2+5x2 |
x2 |
4 |
y2 |
5 |
x2 |
4 |
y2 |
5 |
x | 2A |
20 |
4+5k2 |
y | 2A |
20k2 |
4+5k2 |
|
x | 2M |
20k2 |
5+4k2 |
y | 2M |
20 |
5+4k2 |
x | 2A |
y | 2A |
20(1+k2) |
4+5k2 |
80(1+k2) |
4+5k2 |
20(1+k2) |
5+4k2 |
S | 2△AMB |
1 |
4 |
1 |
4 |
80(1+k2) |
4+5k2 |
20(1+k2) |
5+4k2 |
400(1+k2)2 |
(4+5k2)(5+4k2) |
400(1+k2)2 | ||
(
|
1600(1+k2)2 |
81(1+k2)2 |
40 |
9 |
40 |
9 |
1 |
2 |
5 |
5 |
40 |
9 |
1 |
2 |
5 |
5 |
40 |
9 |
40 |
9 |
x2 |
a2 |
y2 |
b2 |
1 |
2 |
OQ |
OA |
OB |
| ||
2 |