2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
2-x |
2+x |
2-x |
2+x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x |
|
A.[-1,2] | B.[0,2] | C.[1,+∞) | D.[0,+∞) |
1 |
2 |
A.
| B.
| C.
| D.
|
1 |
a |
1 |
b |
A.logab>logba |
B.|logab+logba|>2 |
C.(logba)2<1 |
D.|logab|+|logba|>|logab+logba| |
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