- 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。
- 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
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- 甲醛含量多少范围时，正常可以入住？ - 知乎
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。
- How can 1+1=3 be possible? - Mathematics Stack Exchange
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 ⋅ 5 = 0 ⋅ 7, but that doesn't let you conclude that 5 = 7 5 = 7, because 0 0 has no multiplicative inverse In your case, the number b − a b − a is playing the role of p p, and because b b and a a
- 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
- 1加十三手机（一加13）怎么样？体验3天优缺点测评
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则采用了高通自研Oryon架构，拥有2个超大核和6个大核，双超大核频率高达4 32GHz，性能表现卓越。
- What is the integral of 1 x? - Mathematics Stack Exchange
16 Answers to the question of the integral of 1 x are all based on an implicit assumption that the upper and lower limits of the integral are both positive real numbers If we allow more generality, we find an interesting paradox For instance, suppose the limits on the integral are from − A to + A where A is a real, positive number
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