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完全平方公式？

2014-06-07 18:21:26| 分类：叶子原创 | 标签： |举报 |字号大中小订阅

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"妈，我推出了一个公式，挺有用的，我说给你听听。“

”我数学不好，听不懂，你还是写下来吧！“

”(n+1)?=n?+2n+1“

咦，眼熟！！！！

介个，咱以前学过呀。

”叶子，我给你换一下，你再算算！(a+b)?=？“

叶子算了会儿，最终败下阵来。

经我的一番讲解，叶子终于推出来 (a+b)?=a?+2ab+b?

上网百度了一下，

原来叫做完全平方公式。

叶子能自己推出(n+1)?=n?+2n+1，是不是也不错了？！

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