a |
2 |
b |
2 |
a |
b |
CA |
BD |
2 |
a |
b |
2 |
x2 |
4 |
y2 |
2 |
m |
k |
|
4mk |
1+2k2 |
2m2-4 |
1+2k2 |
CA |
BD |
m |
k |
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 |
OA |
OB |
a |
b |
a |
b |
a |
b |
π |
3 |
AB |
a |
b |
AC |
a |
b |
AD |
A.12 | B.2
| C.5-
| D.2
|
PQ |
a |
b |
c |
a |
b |
2 |
b |
a |
1 |
2 |
a |
c |
b |
c |
c |
a |
b |
a |
b |
© 2017-2019 超级试练试题库,All Rights Reserved.