x2 |
4 |
3 |
3 |
3 |
3 |
|
3 |
|
(x1+x2)2-4x1x2 |
4
| ||
1+4k2 |
1+k2 |
4(1+k2) |
1+4k2 |
2
| ||
|
3 |
|
k2(1+k2) |
(1+4k2)2 |
(
| ||
(1+4k2)2 |
| ||||
(1+4k2)2 |
1 |
16 |
| ||||
(1+4k2)2 |
1 |
2 |
1 |
16 |
1 |
8 |
1 |
16 |
| ||||
(1+4k2)2 |
1 |
16 |
1 |
16 |
s | ||
64s2+24s+
|
1 |
16 |
1 | ||
24+(64s+
|
1 |
16 |
1 | ||||
24+2
|
1 |
12 |
3 |
t |
3 |
|
| ||
2 |
x2 |
5 |
y2 |
m |
x2 |
a2 |
y2 |
b2 |
(x+1)2+y2 |
(x-1)2+y2 |
x2 |
a2 |
y2 |
b2 |
A.2a | B.4a | C.8a | D.2a+2b |
x2 |
a2 |
y2 |
b2 |
x2 |
b2 |
y2 |
c2 |
x2 |
a2 |
y2 |
b2 |
x2 |
b2 |
y2 |
c2 |
x2 |
a2 |
y2 |
b2 |
A.(
| B.(
| C.(
| D.(0,
|
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