题目内容
利用平方差计算:(1+
)(1+
)(1+
)(1+
)
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 16 |
| 1 |
| 256 |
考点:平方差公式
专题:
分析:配上2×(1-
),再依次根据平方差公式进行计算即可.
| 1 |
| 2 |
解答:解:原式=2×(1-
)×(1+
)×(1+
)×(1+
)×(1+
)
=2×(1-
)×(1+
)×(1+
)×(1+
)
=2×(1-
)×(1+
)×(1+
)
=2×(1-
)×(1+
)
=2×(1-
)
=2-
=1
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 16 |
| 1 |
| 256 |
=2×(1-
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 16 |
| 1 |
| 256 |
=2×(1-
| 1 |
| 16 |
| 1 |
| 16 |
| 1 |
| 256 |
=2×(1-
| 1 |
| 256 |
| 1 |
| 256 |
=2×(1-
| 1 |
| 65536 |
=2-
| 2 |
| 65536 |
=1
| 32766 |
| 32768 |
点评:本题考查了平方差公式的应用,注意:平方差公式是(a+b)(a-b)=a2-b2.
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