题目内容
计算:(1-| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 20092 |
| 1 |
| 20102 |
分析:先运用平方差公式,再两两约分即可求解.
解答:解:(1-
)×(1-
)×…×(1-
)×(1-
),
=
×
×
×
×…×
×
×
×
,
=
×
,
=
.
| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 20092 |
| 1 |
| 20102 |
=
| 1 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 3 |
| 2008 |
| 2009 |
| 2010 |
| 2009 |
| 2009 |
| 2010 |
| 2011 |
| 2010 |
=
| 1 |
| 2 |
| 2011 |
| 2010 |
=
| 2011 |
| 4020 |
点评:本题考查了因式分解的应用,解题的关键是应用平方差公式简便计算.
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