题目内容
计算(1-| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 42 |
| 1 |
| 20062 |
分析:先把括号里的式子通分,再把分子分解因式,利用乘法约分即可剩下
×
,所以求出答案为
.
| 1 |
| 2 |
| 2007 |
| 2006 |
| 2007 |
| 4012 |
解答:解:(1-
)(1-
)(1-
)…(1-
)(1-
)(1-
)
=
•
•
…
•
=
×
=
.
故答案为:
.
| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 42 |
| 1 |
| 20042 |
| 1 |
| 20052 |
| 1 |
| 20062 |
=
| 22-1 |
| 22 |
| 32-1 |
| 32 |
| 42-1 |
| 42 |
| 20052-1 |
| 20052 |
| 20062-1 |
| 20062 |
=
| 1 |
| 2 |
| 2007 |
| 2006 |
=
| 2007 |
| 4012 |
故答案为:
| 2007 |
| 4012 |
点评:此题主要考查了因式分解的应用,又考查了代数式求值的方法,解题的关键是正确运算和分解.
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