x2 |
b2 |
y2 |
a2 |
m |
x1 |
b |
y1 |
a |
n |
x2 |
b |
y2 |
a |
m |
n |
| ||
2 |
c |
a |
| ||
a |
| ||
2 |
3 |
y2 |
4 |
3 |
|
3 |
-2
| ||
k2+4 |
-1 |
k2+4 |
m |
n |
x1x2 |
b2 |
y1y2 |
a2 |
1 |
4 |
3 |
3 |
k2 |
4 |
| ||
4 |
3 |
4 |
k2+4 |
4 |
1 |
k2+4 |
| ||
4 |
-2
| ||
k2+4 |
3 |
4 |
2 |
m |
n |
y12 |
4 |
4x12 |
4 |
| ||
2 |
2 |
1 |
2 |
1 |
2 |
|
-2kb |
k2+4 |
b2-4 |
k2+4 |
y1y2 |
4 |
(kx1+b)(kx2+b) |
4 |
1 |
2 |
|b| | ||
|
1 |
2 |
(x1+x2)2-4x1x2 |
|b|
| ||
k2+4 |
| ||
2|b| |
5 |
5 |
OA |
OB |
|
x2 |
a2 |
y2 |
b2 |
x2 |
a2 |
y2 |
b2 |
A.e12+e22<2e32 | B.e1e2<e3 |
C.e1e2>e3 | D.e22-e12>2e32 |
3 |
2 |
1 |
2 |
x2 |
a2 |
y2 |
b2 |
1 |
2 |
x |
a |
y |
b |
| ||
7 |
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