题目内容
计算:(1-
)(1-
)(1-
)(1-
).
| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 42 |
| 1 |
| 20042 |
分析:根据平方差公式求解即可.
解答:解:原式=(1-
)(1+
)(1-
)(1+
)…(1-
)(1+
)
=
×
×
×
×…×
×
=
×
=
.
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| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2004 |
| 1 |
| 2004 |
=
| 1 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 3 |
| 2003 |
| 2004 |
| 2005 |
| 2004 |
=
| 1 |
| 2 |
| 2005 |
| 2004 |
| 2005 |
| 4008 |
点评:本题考查了平方差公式的知识,解答本题的关键是熟练掌握平方差公式:(a+b)(a-b)=a2-b2.
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