1-x |
1+x |
x+y |
1+xy |
1-x |
1+x |
1+x |
1-x |
1-x |
1+x |
1-x |
1+x |
1-y |
1+y |
1-x |
1+x |
1-y |
1+y |
1+xy-(x+y) |
1+xy+(x+y) |
1-
| ||
1+
|
x+y |
1+xy |
A.0 | B.-1 | C.1 | D.无法确定 |
A.y=x | B.y=x2 | C.y=4x | D.y=log4x |
1 |
2 |
A.f(-n)<f(n-1)<f(n+1) | B.f(n-1)<f(-n)<f(n+1) |
C.f(n+1)<f(-n)<f(n-1) | D.f(n+1)<f(n-1)<f(-n) |
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