x2 |
a2 |
y2 |
b2 |
π |
6 |
| ||
2 |
ED |
DF |
b |
a |
| ||
3 |
1 |
2 |
1 |
2 |
| ||
2 |
a2+b2 |
3 |
x2 |
3 |
x2 |
3 |
ED |
DF |
2m |
m2+3 |
-2 |
m2+3 |
2m |
m2+3 |
1 |
m2+3 |
x2 |
3 |
-12k+14 |
3k2+1 |
7 |
6 |
7 |
6 |
x2 |
4 |
2 |
OA |
OB |
x2 |
a2 |
y2 |
b2 |
y2 |
2 |
A.存在一条,且方程为2x-y-1=0 |
B.存在无数条 |
C.存在两条,方程为2x±(y+1)=0 |
D.不存在 |
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