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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 …
Why is $1$ not a prime number? - Mathematics Stack Exchange
Why is 1 1 not considered a prime number? Or, why is the definition of prime numbers given for integers greater than 1 1?
Why is $1/i$ equal to $-i$? - Mathematics Stack Exchange
May 11, 2015 · 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 …
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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。
How can 1+1=3 be possible? - Mathematics Stack Exchange
Feb 3, 2021 · 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 …
I have learned that 1/0 is infinity, why isn't it minus infinity?
92 The other comments are correct: 1 0 1 0 is undefined. Similarly, the limit of 1 x 1 x as x x approaches 0 0 is also undefined. However, if you take the limit of 1 x 1 x as x x approaches …
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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 …
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 …