x2 |
a2 |
y2 |
b2 |
| ||
2 |
| ||
2 |
1 |
4 |
| ||
b2 |
x2 |
4 |
3 |
3 |
OA |
OB |
3 |
3 |
1 |
2 |
3 |
1 |
2 |
OA |
OB |
11 |
4 |
3 |
|
3 |
8
| ||
1+4k2 |
12k2-4 |
1+4k2 |
3 |
3 |
3 |
-k2 |
1+4k2 |
OA |
OB |
12k2-4 |
1+4k2 |
-k2 |
1+4k2 |
11k2-4 |
1+4k2 |
2
| ||
11 |
2
| ||
11 |
3 |
A.x+y+1=0 | B.4x-3y=0 |
C.x+y+1=0或4x-3y=0 | D.4x+3y=0或x+y+1=0 |
3 |
A.3x+4y-1=0 | B.3x+4y+1=0或3x+4y-9=0 |
C.3x+4y+9=0 | D.3x+4y-1=0或3x+4y+9=0 |
A.y=±
| B.y=
| ||||||
C.y=±
| D.y=-
|
A.x-y+1=0 | B.x-y+1=0或3x-2y=0 |
C.x+y-5=0 | D.x+y-5=0或3x-2y=0 |
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