a |
b |
a |
b |
A.[-4,6] | B.[-6,4] | C.[-6,2] | D.[-2,6] |
a |
b |
a |
b |
a |
b |
9+(k+2)2 |
a |
b |
9+(k+2)2 |
BD |
DC |
AD |
AB |
AC |
m |
n |
PA |
PB |
PC |
AB |
A.P在CA上,且
| B.P在AB上,且
| ||||||||
C.P在BC上,且
| D.P点为△ABC的重心 |
a |
b |
OP |
OA |
OB |
a |
b |
a |
b |
a |
b |
AB |
a |
AD |
b |
AC |
c |
BD |
d |
A.
| B.
| C.
| D.
|
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