a |
b |
a |
b |
b |
a |
A.[1,3] | B.[2,4] | C.[3,5] | D.[4,6] |
a |
b |
b |
a |
(2
|
4|
|
17-8cosα |
17-8cosα |
AB |
BC |
AC |
A.0 | B.2 | C.
| D.2
|
a |
| ||
2 |
| ||
2 |
A.
| B.
| C.-
| D.-
|
a |
b |
3 |
a |
b |
A.4
| B.4,0 | C.16.0 | D.4,4
|
OA |
OB |
OA |
OB |
OA |
OB| |
A.2 | B.-2 | C.
| D.2或-2 |
a |
b |
2 |
11π |
12 |
17π |
12 |
a |
b |
a |
b |
4
| ||
5 |
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