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6 Ad1 D0 B3 E2 F7 4 Bc6 81 Fb 831 A978 F57 Da Hosted At Imgbb Imgbb 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. Why is 1 i 1 i equal to −i i? ask question asked 10 years, 1 month ago modified 6 months ago viewed 113k times.

4 E0 D80 E9 193 B 4 D37 89 D6 218174335 Fa9 Hosted At Imgbb Imgbb 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。. 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。. 实际上，天气预报中所说的雨量跟公众了解的积水深度并不能完全等同。 气象上一般把连续24小时，降水量50毫米以上的雨叫暴雨。 我们先以1毫米降水为例，看看小雨的威力。 首先，1毫米雨，看上去微乎其微，但如果降雨的范围（面积）很大，雨量也很可观。. 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。.

Abb83 B9 C 8312 4 A5 B 9 D01 A97 Adf4 Fbe31 Hosted At Imgbb Imgbb 实际上，天气预报中所说的雨量跟公众了解的积水深度并不能完全等同。 气象上一般把连续24小时，降水量50毫米以上的雨叫暴雨。 我们先以1毫米降水为例，看看小雨的威力。 首先，1毫米雨，看上去微乎其微，但如果降雨的范围（面积）很大，雨量也很可观。. 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。. You'll need to complete a few actions and gain 15 reputation points before being able to upvote. upvoting indicates when questions and answers are useful. what's reputation and how do i get it? instead, you can save this post to reference later. 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. 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. 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。.

D5 B8 De2 F 1 F24 4 D3 C A898 E4 Cca878 Ff01 Postimages You'll need to complete a few actions and gain 15 reputation points before being able to upvote. upvoting indicates when questions and answers are useful. what's reputation and how do i get it? instead, you can save this post to reference later. 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. 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. 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。.

0 Edb1946 E9 D5 4 C5 C 82 C8 Ddf4 De4 A0 Dda Postimages 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. 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。.