A.
| B.
| C.
| D.
|
lg18 |
lg4 |
lg(2×9) |
lg22 |
lg2+2lg3 |
2lg2 |
a+2b |
2a |
x |
2 |
1 |
2 |
A.2
| B.e2-
| C.2-ln2 | D.2+ln2 |
A.logax2=2logax | B.logax2=2loga|x| |
C.loga|x•y|=loga|x|loga|y| | D.loga3>loga2 |
| ||
24 |
A.
| B.9 | C.18 | D.27 |
A.(-∞,-3) | B.(1,+∞) | C.(-∞,-1) | D.(-1,+∞) |
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