题目内容
计算:
(1)
;
(2)2
×
×
.
(1)
| 4 | 81×
| ||||
(2)2
| 3 |
| 3 | 1.5 |
| 6 | 12 |
考点:根式与分数指数幂的互化及其化简运算
专题:计算题
分析:根据幂的运算性质和分数指数幂的含义进行化简求值即可.
解答:
解:(1)
=
=
=
=
=3
;
(2)2
×
×
=2×3
×(
)
×(22×3)
=2 1-
+
×3
+
+
=2×3
=6
| 4 | 81×
| ||||
=
| 4 | 81×
| ||||
=
| 4 | 81×
| ||
=
| 4 | 34×3
| ||
=
| 4 | 3
| ||
=3
| 11 |
| 8 |
(2)2
| 3 |
| 3 | 1.5 |
| 6 | 12 |
=2×3
| 1 |
| 2 |
| 3 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
=2 1-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
=2×3
=6
点评:本题主要考查幂的运算性质和分数指数幂的含义,属于基础题.
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