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- abstract algebra - Prove that 1+1=2 - Mathematics Stack Exchange
The main reason that it takes so long to get to $1+1=2$ is that Principia Mathematica starts from almost nothing, and works its way up in very tiny, incremental steps The work of G Peano shows that it's not hard to produce a useful set of axioms that can prove 1+1=2 much more easily than Whitehead and Russell do
- iOS18. 4. 1 正式版发布了，这次更新究竟带来了哪些实质性的变化？ - 知乎
除了功能修复，iOS 18 4 1还针对两个高危漏洞进行了修补，第一个是CoreAudio组件漏洞：攻击者可通过恶意音频文件触发内存损坏，进而远程执行代码。 这一漏洞可能通过伪装成音乐或播客应用的第三方服务传播，对用户隐私构成威胁，修复之后不用担心了。
- 1 1+1 2+1 3+1 4+……+1 n=？怎么个解法？ - 知乎
红线是n-1到n的割线，绿线是n处的切线 图像上显然，割线的斜率大于切线的斜率。
- 1 8, 1 4, 1 2, 3 4,7 8英寸分别是多少厘米? - 知乎
把1英寸分成8等分: 1 8 1 4 3 8 1 2 5 8 3 4 7 8 英寸。 This is an arithmetic sequence since there is a common difference between each term In this case, adding 18 to the previous term in the sequence gives the next term In other words, an=a1+d(n−1) Arithmetic Sequence: d=1 8
- what is 1 - 1 2 + 1 3 - 1 4 + 1 5 - 1 6 + 1 7 - 1 8 +1 9
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- Word，插入多级列表，但是改了1. 1，第二章的2. 1也变成1. 1，随着改变而改变，这种情况怎么处? - 知乎
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、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视
- 有问题，就会有答案 - 知乎
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、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视、时
- Binomial expansion of $(1-x)^n$ - Mathematics Stack Exchange
(1+a)^n This yields exactly the ordinary expansion Then, by substituting -x for a, we see that the solution is simply the ordinary binomial expansion with alternating signs, just as everyone else has suggested
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