a |
b |
5 |
a |
b |
b |
A.(-4,2) | B.(4,2) | C.(4,-2)或(-4,2) | D.(-4,-2)或(4,2) |
b |
a |
a |
b |
b |
5 |
b |
OA |
OB |
OA |
OB |
A.(-
| B.(
| C.(-2,-
| D.(-2,2) |
e1 |
e2 |
e1 |
e2 |
e1 |
e2 |
PA |
PB |
PA |
PB |
AB |
PC |
PA |
PB |
PC |
AB |
AC |
BC |
A.[3,13] | B.(3,8) | C.[3,8] | D.(3,13) |
an |
nπ |
6 |
nπ |
6 |
b |
3 |
a1 |
b |
a2 |
b |
a10 |
b |
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