What does $QAQ^{-1}$ actually mean? - Mathematics Stack …
Apr 28, 2020 · I'm self-learning Linear Algebra and have been trying to take a geometric approach to understand what matrices mean visually. I've noticed this matrix product pop up repeatedly …
怎样区分车牌号上的1和I、0和O？ - 知乎
省份简称+发证单位编号这里，比如京A、桂B、浙C，用的全是字母，没有数字 后面4-6位纯数字或字母+数字的序号，不使用英文字母I和O 比如 汉东省 车牌号 汉O·10001 前面一定是字母o， …
summation - Sum of 1 + 1/2 - Mathematics Stack Exchange
How do I calculate this sum in terms of 'n'? I know this is a harmonic progression, but I can't find how to calculate the summation of it. Also, is it an expansion of any mathematical function? 1 ...
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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。
what is 1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 + 1/7 - 1/8 +1/9
Nov 28, 2019 · Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and …
abstract algebra - Prove that 1+1=2 - Mathematics Stack Exchange
Jan 15, 2013 · Possible Duplicate: How do I convince someone that $1+1=2$ may not necessarily be true? I once read that some mathematicians provided a very length proof of $1+1=2$. Can …
vscode配置c++环境，这个报错是什么原因（c语言配置好了可以正 …
Feb 25, 2025 · 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。
endnote插入文献时出现 {，#}这样的乱码，怎么解？ - 知乎
曾经出现过这样的情况，供参考： 问题描述：直接把在endnote下完成的word文档1发给老师修改 ️老师将修改过后，并将文档1整合入文档2发给我 ️我再次修改文档2时，发现用endnote不 …
How can 1+1=3 be possible? - Mathematics Stack Exchange
Feb 3, 2021 · So that's the "proof". The failure is at step 5, where you say that pq = pr p q = p r implies that q = r q = r; that's true only if you know p p is nonzero. For instance 0 ⋅ 5 = 0 ⋅ 7 0 ⋅ …
关于CAD里的比例问题我一直有疑问1：1与1：100的比例究竟有什 …
2.每个图下面写的比例（比如平面1：100，楼梯详图1：50），都是你实际的打印比例（即ctrl+P的时候） 3.右下角的比例是跟打印比例对应的，你改变这个数值，墙线的类型和标注的大小是会 …