MP |
A.-2 | B.-
| C.
| D.3 |
MP |
0+λ•4 |
1+λ |
1 |
3 |
OA |
OB |
A.(2,-4) | B.(3,1) | C.(-2,4) | D.(6,2) |
P1P |
PP2 |
A.(-8,15) | B.(0,3) | C.(-
| D.(1,
|
AB |
3 |
4 |
BP |
A.-
| B.
| C.-
| D.
|
AD |
3 |
5 |
AB |
2 |
5 |
AC |
A.BD=
| B.BD=
| C.BD=
| D.BD=
|
MP |
1 |
2 |
PN |
MN |
A.
| B.-
| C.±
| D.2或
|
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