a |
b |
a |
b |
a |
b |
b |
a |
a |
a |
b |
a |
b |
a |
a |
b |
b |
a |
b |
|
|
a |
7 |
5 |
1 |
5 |
a |
7 |
5 |
1 |
5 |
CD |
1 |
2 |
CA |
CB |
x 2 |
4 |
y2 |
3 |
m |
OA |
OB |
m |
OF |
A.2x-y-2=0 | B.2x+y-2=0 | C.2x-y+2=0 | D.2x+y+2=0 |
a |
b |
a |
b |
A.[5,+∞) | B.(5,+∞) | C.(-∞,5] | D.(-∞,5) |
AP |
BP |
CP |
AB |
AC |
AP |
AD |
OP |
AB |
A.6 | B.-6 | C.12 | D.-12 |
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