a |
b |
|a| |
|b| |
|b| |
a |
b |
a |
b |
a |
A.1 | B.
| C.2 | D.3 |
|a| |
|b| |
|b| |
a |
b |
a |
b |
a |
b |
a |
b |
a |
a |
b |
a |
a |
a |
b |
AB |
AC |
A.5 | B.-5 | C.
| D.-
|
a |
b |
a |
b |
A.2 | B.-2 | C.8 | D.-8 |
OA |
OB |
AB |
AC |
OC |
A.(-2,1) | B.(-2,0) | C.(3,4) | D.(3,1) |
OM |
1 |
2 |
A.-
| B.-
| C.-
| D.-3 |
a |
b |
a |
b |
a |
b |
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