x2+1 |
A.y=
| B.y=
| ||||
C.y=
| D.y=
|
x2+1 |
x2+1 |
x2+1 |
e2y-1 |
2ey |
1 |
2 |
x2+1 |
x2+1 |
1 |
2 |
|
x |
|
|
|
1 |
2 |
1+(-1)λ |
2 |
1-(-1)λ |
2 |
A.1 | B.-1 | C.1或-1 | D.11 |
A.(-∞,2] | B.(-∞,-4]∪[2,+∞) | C.[-2,+∞) | D.(-∞,-2]∪[4,+∞) |
1-x2 |
A.[-1,1] | B.[-1,0] | C.[0,1] | D.(-1,1) |
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