x2 |
3 |
y2 |
4 |
15 |
x2 |
3 |
y2 |
4 |
x2 |
b2 |
15 |
15 |
3y1y2-6(y1+y2)+12 |
5 |
|
36 |
9-15b2 |
15b2+36 |
9-15b2 |
x2 |
3 |
9 |
4 |
1+
|
1+
|
1-4×(-
|
2 |
3 |
x2 |
a2 |
y2 |
b2 |
3 |
A.
| B.
| ||||||||
C.
| D.
|
OA |
OB |
A.3 | B.-3 | C.12 | D.-12 |
BP |
PA |
OQ |
AB |
A.3x2+
| B.3x2-
| ||||
C.
| D.
|
3 |
A.
| B.2
| C.4 | D.8 |
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