题目内容
化简(1+2-
)(1+2-
)(1+2-
)(1+2-
)(1+2-
)的结果是 .
| 1 |
| 32 |
| 1 |
| 16 |
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 2 |
分析:只在在原式的基础上乘以
,就可以不断的形成平方差,从而求得结果.
1-2-
| ||
1-2-
|
解答:解:(1+2-
)(1+2-
)(1+2-
)(1+2-
)(1+2-
)
=
=
=
=
=
=
(1-2-
)-1
故答案为
(1-2-
)-1
| 1 |
| 32 |
| 1 |
| 16 |
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 2 |
=
(1+2-
| ||||||||||||
1-2-
|
=
(1-2-
| ||||||||||
1-2-
|
=
(1-2-
| ||||||||
1-2-
|
=
(1-2-
| ||||||
1-2-
|
=
(1-2-
| ||||
1-2-
|
=
| 1 |
| 2 |
| 1 |
| 32 |
故答案为
| 1 |
| 2 |
| 1 |
| 32 |
点评:此题考查了有理数指数幂的化简,巧妙运用1=
是解题的关键,属于中档题.
1-2-
| ||
1-2-
|
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化简:(1+2-
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| 1 |
| 32 |
| 1 |
| 16 |
| 1 |
| 8 |
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| 4 |
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| ||||
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