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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 …
卡路里、千焦、大卡傻傻分不清楚?关于热量看这一篇就够了
千焦和千卡的换算关系是:1000千焦=238.9大卡,1 大卡(千卡)=4.18千焦(KJ),一般千焦换算成大卡可以直接除以4.18来计算如果要粗略计算热量,直接除以4即可。
空调的功率一般多大? - 知乎
@知乎好物 100 看看空调铭牌上,和功率有关的,就有好几组数据,它们到底是啥意思? 我们平常说的空调功率指的是啥?下面我一一解读一下,不完善的,朋友们可以补充。 1.平常说的功 …
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 ...
为什么 1 不能被认为是质数? - 知乎
质数就是“只能被1和它本身整除”的自然数。 然而,我们必须在此基础之上增加一条警告,宣称数字1不是质数,这简直就像马后炮一样。
1加十三手机(一加13)怎么样?体验3天优缺点测评
Nov 4, 2024 · 二:一加13(1加十三手机)优点 强大的性能配置:搭载了骁龙8至尊版移动平台,这是高通最新一代的旗舰级处理器,采用台积电第二代3nm工艺制程,CPU则采用了高通自 …
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 …
毕业论文正文标题五六级怎么格式? - 知乎
常用标题一般分为三级,这个主要指目录页显示的标题(本人称为主标题),如普通型中“1" 、"1.1"、和“1.1.1”,其他小标题随便用,若给出格式要求按格式要求,未给格式要求则做到每章 …
Easy way to remember Taylor Series for log(1+x)?
May 2, 2015 · Assuming $|x|<1$, if one can easily remember that $$ \\dfrac{1}{1-x}=\\sum_{n=0}^{\\infty}x^{n} $$ then one can derive the following \\begin{eqnarray*} \\mbox{log ...
Exactly how does the equation n (n-1)/2 determine the number of …
Apr 2, 2017 · The formula n(n − 1) / 2 for the number of pairs you can form from an n element set has many derivations, even many on this site. One is to imagine a room with n people, each of …