题目内容
若a>0,a
=
,则a=
,
=
| 2 |
| 3 |
| 4 |
| 9 |
| 8 |
| 27 |
| 8 |
| 27 |
| log | a
|
3
3
.分析:由a>0,a
=
=(
)2,知a
=
,由此能求出a和
的值.
| 2 |
| 3 |
| 4 |
| 9 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
| log | a
|
解答:解:∵a>0,a
=
=(
)2,
∴a
=
,
∴a=(
)3=
,
=log
(
)3=3.
故答案为:
,3.
| 2 |
| 3 |
| 4 |
| 9 |
| 2 |
| 3 |
∴a
| 1 |
| 3 |
| 2 |
| 3 |
∴a=(
| 2 |
| 3 |
| 8 |
| 27 |
| log | a
|
| 2 |
| 3 |
| 2 |
| 3 |
故答案为:
| 8 |
| 27 |
点评:本题考查指数与对数式和对数式的互化,是基础题.解题时要认真审题,仔细解答.
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