e 的存在，使得 e^{x} 是求导运算的不动点。-----有了数字 e, 并定义了它的指数，对数是指数的反函数。以 e 为底数，我们可以定义对数函数。 \ln (x) PS: 在定义 ln(x) 之前，已经说明了存在 …

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Welcome to r/OnePiece, the community for Eiichiro Oda's manga and anime series One Piece. From the East Blue to the New World, anything related to the world of One Piece belongs …

In your top level comment be sure to include one abbreviation for your judgment, i.e. YTA = You're the Asshole. YWBTA = You Would Be the Asshole. NTA = Not the Asshole (and the …

Memes! A way of describing cultural information being shared. An element of a culture or system of behavior that may be considered to be passed from one individual to another by nongenetic …

知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业 …

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Expanded and Enhanced (E&E) Edition of GTA Online. E&E/Next-Gen GTA Online Combined General Information, Transfer Info, and FAQ Thread by /u/PapaXan. List of Supported …

All text posts, and submissions must be about wrestling or wrestling personalities. Posts with a tenuous connection to wrestling (e.g. an action performed by a wrestling personality with no …