x2 |
4 |
y2 |
3 |
x |
2 |
3 |
2 |
x |
2 |
x2 |
4 |
y2 |
3 |
m |
2 |
3 |
4 |
3 |
2 |
x |
2 |
y1-
| ||
x1-1 |
y2-
| ||
x2-1 |
x1x2+(m-
| ||||
x1x2-(x1+x2)+1 |
m2-3+(m-
| ||||
m2-3+m+1 |
|
A.(0,1] | B.[0,1) | C.(0,+∞) | D.[0,+∞) |
x2 |
4 |
A.曲线C上的所有点都是“H点” |
B.曲线C上仅有有限个点是“H点” |
C.曲线C上的所有点都不是“H点” |
D.曲线C上有无穷多个点(但不是所有的点)是“H点” |
x2 |
3 |
y2 |
4 |
15 |
2 |
3 |
x2 |
a2 |
y2 |
b2 |
3 |
A.
| B.
| ||||||||
C.
| D.
|
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