x2 |
1+x2 |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
5 |
x2 |
1+x2 |
1 |
x |
x2 |
1+x2 |
| ||
1+(
|
x2 |
1+x2 |
1 |
1+x2 |
1+x2 |
1+x2 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
5 |
1 |
2 |
1 |
2 |
1 |
2 |
9 |
2 |
9 |
2 |
A.(-∞,1] | B.[-1,
| C.[0,
| D.[1,2) |
A.y=x
| B.y=-x|x| | C.y=2x+2-x | D.y=2x-2-x |
|
A.(1,+∞) | B.(1,8) | C.(4,8) | D.[4,8) |
A.y=
| B.y=1-x | C.y=x2+x | D.y=1-x2 |
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