OM |
OB |
OA |
A.点M在线段AB上 | B.点B在线段AM上 |
C.点A在线段BM上 | D.O、A、M、B四点一定共线 |
OM |
OB |
OA |
OM |
OA |
OB |
OA |
AM |
AB |
AM |
AB |
x2 |
a2 |
y2 |
b2 |
2 |
5 |
4 |
MA |
MB |
e1 |
e2 |
a |
e1 |
e2 |
b |
e1 |
e2 |
a |
b |
a |
b |
a |
b |
a |
b |
A.6 | B.-6 | C.
| D.-
|
AC |
CB |
A.(-3,4) | B.(4,-3) | C.(
| D.(1,-
|
a |
a |
A.(
| B.(
| C.(-
| D.(-1,-
|
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