题目内容
化简:(1)(
)-
•
=
.(a>0,b>0)
(2)(
×
)6+(
)
-4(
)-
-
×80.25-(-2005)0=
| 1 |
| 4 |
| 1 |
| 2 |
(
| ||
(0.1)-2(a3b-3)
|
| 4 |
| 25 |
| 4 |
| 25 |
(2)(
| 3 | 2 |
| 3 |
2
|
| 4 |
| 3 |
| 16 |
| 49 |
| 1 |
| 2 |
| 4 | 2 |
100
100
.分析:(1)先将根式化成分数指数幂,然后根据指数运算化简整理,即可求出所求;
(2)先将根式化成分数指数幂,然后根据(-2005)0=1,以及指数运算化简整理,即可求出所求;
(2)先将根式化成分数指数幂,然后根据(-2005)0=1,以及指数运算化简整理,即可求出所求;
解答:解:(1)(
)-
•
=2×
=
(2)(
×
)6+(
)
-4(
)-
-
×80.25-(-2005)0
=(2
3
) 6+(2
2
)
-4×
-2
× 8
-1
=4×27+2-7-2-1
=100
故答案为:
,100
| 1 |
| 4 |
| 1 |
| 2 |
(
| ||
(0.1)-2(a3b-3)
|
=2×
23a
| ||||
100a
|
=
| 4 |
| 25 |
(2)(
| 3 | 2 |
| 3 |
2
|
| 4 |
| 3 |
| 16 |
| 49 |
| 1 |
| 2 |
| 4 | 2 |
=(2
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 4 |
| 4 |
| 3 |
| 7 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=4×27+2-7-2-1
=100
故答案为:
| 4 |
| 25 |
点评:本题主要考查了根式与分数指数幂的互化及其化简运算,同时考查了计算能力,属于基础题.
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