题目内容
计算:(| 3 | 2 |
| 3 |
2
|
| 4 |
| 3 |
| 16 |
| 49 |
| 1 |
| 2 |
| 4 | 2 |
分析:利用
=a
写出分数指数幂,同时利用同底数幂的乘法法则运算,再利用幂的乘方运算法则得到值即可.
| n | a |
| 1 |
| n |
解答:解:(
×
)6+(
)
-4(
)-
-
×80.25-(-2005)0
=(2
×3
)6+[(2×2
)
]
-4[(
)2]-
-2
×2
-1
=22×33+2-7-2-1
=100
| 3 | 2 |
| 3 |
2
|
| 4 |
| 3 |
| 16 |
| 49 |
| 1 |
| 2 |
| 4 | 2 |
=(2
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 4 |
| 3 |
| 4 |
| 7 |
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
=22×33+2-7-2-1
=100
点评:此题考查学生理解n次方根与根式的概念以及与分数指数的关系,会将根式化为分数指数幂,是一道中档题.
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