题目内容
化简(log2
+log27)+
•2
的结果等于( )
| 1 |
| 7 |
| 4 | 23 |
| 1 |
| 4 |
| A.0 | B.1f(x)=x3-3x-3 |
| C.2 | D.4 |
(log2
+log27)+
•2
=log2(
× 7)+2
•2
=log21 +2
+
=2
故应选C.
| 1 |
| 7 |
| 4 | 23 |
| 1 |
| 4 |
=log2(
| 1 |
| 7 |
| 3 |
| 4 |
| 1 |
| 4 |
=log21 +2
| 1 |
| 4 |
| 3 |
| 4 |
故应选C.
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相关题目
化简(log2
+log27)+
•2
的结果等于( )
| 1 |
| 7 |
| 4 | 23 |
| 1 |
| 4 |
| A、0 |
| B、1f(x)=x3-3x-3 |
| C、2 |
| D、4 |