abstract algebra - Prove that 1+1=2 - Mathematics Stack Exchange
Jan 15, 2013 · 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. …
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？ …
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 …
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 …
what is 1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 + 1/7 - 1/8 +1/9
Nov 28, 2019 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
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 …
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 …
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 …
How can 1+1=3 be possible? - Mathematics Stack Exchange
Feb 3, 2021 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
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 …
Sum of 1 - 1/2 + 1/3 +.... + 1/n - Mathematics Stack Exchange
One can write $$1+\frac12+\frac13+\cdots+\frac1n=\gamma+\psi(n+1)$$ where $\gamma$ is Euler's constant and $\psi$ is the digamma function. Of course, one reason for creating the …