2x |
1+x |
|
2x |
x+1 |
y |
2-y |
x |
2-x |
x |
2-x |
lg2+lg5-lg8 |
lg50-lg40 |
1 |
2 |
1 |
2 |
x
| ||||
x2+x-2+3 |
1 |
3 |
A.a<b<c | B.c<a<b | C.a<c<b | D.c<b<a |
A.a<c<b | B.a<b<c | C.c<b<a | D.c<a<b |
A.(-1,1) | B.(-1,0)∪(0,1) | ||||
C.∅ | D.(-∞,-
|
1 |
2 |
1 |
x |
A.{x|0<x<1} | B.{x|x>2} |
C.{x|0<x<1或x>2} | D.{x|x<0或1≤x≤2} |
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