a |
b |
c |
a |
b |
c |
a |
c |
b |
a |
b |
c |
a |
b |
c |
|
5 |
9 |
8 |
9 |
a |
c |
b |
a |
a |
c |
b |
a |
16 |
13 |
a |
b |
a |
1 |
2 |
b |
AB |
e |
e |
BC |
e |
e |
CD |
e |
e |
A.A,B,C三点共线 | B.A,C,D三点共线 |
C.A,B,D三点共线 | D.B,C,D三点共线 |
a |
b |
a |
b |
A.(4,1) | B.(1,4) | C.(4,2) | D.(2,-2) |
a |
b |
a |
b |
a |
b |
c |
a |
b |
c |
d |
a |
b |
d |
c |
a |
b |
a |
b |
a |
b |
A.2 | B.1 | C.0 | D.-1 |
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