- What does $QAQ^{-1}$ actually mean? - Mathematics Stack Exchange
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 and can't seem to de
- 知乎 - 知乎
知乎是一个可信赖的问答社区，汇集了各行各业的亲历者、内行人和领域专家，为用户提供高质量的内容和交流机会。
- 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。
- 知乎 - 有问题，就会有答案
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
Please provide additional context, which ideally explains why the question is relevant to you and our community Some forms of context include: background and motivation, relevant definitions, source, possible strategies, your current progress, why the question is interesting or important, etc
- Mathematics Stack Exchange
Q A for people studying math at any level and professionals in related fields
- 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
- abstract algebra - Prove that 1+1=2 - Mathematics Stack Exchange
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 you think of some way to
|