题目内容
计算:(1+
)×(1+
)×(1+
)×(1+
)×(1+
).
| 1 |
| 2 |
| 1 |
| 22 |
| 1 |
| 24 |
| 1 |
| 28 |
| 1 |
| 216 |
考点:平方差公式
专题:
分析:将原式乘以(1-
)×2,进而利用平方差公式求出即可.
| 1 |
| 2 |
解答:解:(1+
)×(1+
)×(1+
)×(1+
)×(1+
)
=(1-
)(1+
)×(1+
)×(1+
)×(1+
)×(1+
)×2
=(1-
)(1+
)×(1+
)×(1+
)×(1+
)×2
=(1-
)×2
=2-
.
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| 2 |
| 1 |
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| 24 |
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| 28 |
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| 216 |
=(1-
| 1 |
| 2 |
| 1 |
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| 1 |
| 22 |
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| 24 |
| 1 |
| 28 |
| 1 |
| 216 |
=(1-
| 1 |
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| 1 |
| 22 |
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=(1-
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| 232 |
=2-
| 1 |
| 231 |
点评:此题主要考查了平方差公式的应用,熟练应用平方差公式是解题关键.
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