题目内容
求值：(
)
=
，log2（47×25）=______．
| 81 |
| 16 |
| 3 |
| 4 |
| 27 |
| 8 |
(
)
=
=
，
=
+
=7log24+5log22=19．
| 81 |
| 16 |
| 3 |
| 4 |
81
| ||
16
|
| 27 |
| 8 |
| log | (47×25) 2 |
| log | 472 |
| log | 252 |
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题目内容
| 81 |
| 16 |
| 3 |
| 4 |
| 27 |
| 8 |
| 81 |
| 16 |
| 3 |
| 4 |
81
| ||
16
|
| 27 |
| 8 |
| log | (47×25) 2 |
| log | 472 |
| log | 252 |