x |
x2+1 |
-x |
(-x)2+1 |
-x |
x2+1 |
x1 |
x12+1 |
x2 |
x22+1 |
x1(x22+1)-x2(x12+1) |
(x12+1)(x22+1) |
(x2-x1)(x1x2-1) |
(x12+1)(x22+1) |
|
1 |
2 |
1 |
2 |
4 |
x |
A.y=lgx | B.y=(
| C.y=x|x| | D.y=-x3 |
x2 |
1+x2 |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
5 |
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 |
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