3条评论


  1. Wow, fantastic blog layout! How long have you been blogging for?

    you make blogging look easy. The overall look of your web site is
    great, as well as the content! http://www.sophiechassat.com

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  2. Liam

    将(4)迭代下去的结果,也就是公式(7)有误,应该是f(x)的n阶导,并不是从一阶导连乘到n阶导,望博主采纳

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  3. szk上着课

    赞!

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