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- 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
- Double induction example: $ 1 + q - Mathematics Stack Exchange
Slightly relevant: you can see my answer on this thread for a proof that uses double induction (just to get you exposed to how the mechanics of a proof using double induction might work)
- 想请大神给小白科普一下音频声道的专业知识，什么是2. 1声道、5. 1声道、7. 1声道?
5 1声道的第一次使用，追溯到1976年，当时杜比实验室修改了Todd-AO 70毫米胶片上6个类比音轨的使用方式，但当时在电影《洛根的逃亡》中杜比实验室的光学矩阵编码系统中，没有使用独立的环绕声，因此还不是真正的5 1，杜比实验室第一次在70毫米胶片中使用
- Why is $1 i$ equal to $-i$? - Mathematics Stack Exchange
While 1 i = i−1 1 i = i 1 is true (pretty much by definition), if we have a value c c such that c∗i = 1 c ∗ i = 1 then c= i−1 c = i 1 This is because we know that inverses in the complex numbers are unique
- 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。
- Formula for $1^2+2^2+3^2+. . . +n^2$ - Mathematics Stack Exchange
$ (n+1)^3 - n^3 = 3n^2+3n+1$ - so it is clear that the $n^2$ terms can be added (with some lower-order terms attached) by adding the differences of cubes, giving a leading term in $n^3$ The factor 1 3 attached to the $n^3$ term is also obvious from this observation
- 正常人可以注射司美格鲁肽减肥吗？？ - 知乎
PS：这个药也有一定的戒酒作用，打完了不光不想吃饭，也不想喝酒。 需要反复强调的是，要想维持长期减脂效果，必须有减脂期和正常吃饭期交替，以维持基础代谢，例如如用药控制饮食4-6周，可以正常吃饭（绝不是放纵饮食）1周甚至2～3周，再重新启动。
- factorial - Why does 0! = 1? - Mathematics Stack Exchange
Intending on marking as accepted, because I'm no mathematician and this response makes sense to a commoner However, I'm still curious why there is 1 way to permute 0 things, instead of 0 ways
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