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  • 如何定义什么是 1? - 知乎
    我们可以从数学上证明 1+1=2,但是如何定义 1 是什么。如果说是 0 的后继数,那又如何定义 0 呢?
  • 知乎 - 知乎
    知乎是一个中文互联网高质量问答社区和创作者聚集的原创内容平台,提供知识共享、互动交流和个人成长机会。
  • 为什么 1 不能被认为是质数? - 知乎
    m = p 1 a 1 p 2 a 2 p 3 a 3 p n a n 什么意思呢? 它表示这样一个结论:对于任意的一个整数,你都能把它因数分解,而且结果是唯一的。 举个例子:1001只能被分解成7×11×13,而且你再也找不到除 (7,11,13)外的一组质数,使它们的乘积是1001。 那么这个定理有什么用呢?
  • 1 1+1 2+1 3+1 4+……+1 n=?怎么个解法? - 知乎
    红线是n-1到n的割线,绿线是n处的切线 图像上显然,割线的斜率大于切线的斜率。 所以我们有割线的斜率 \dfrac {\ln \left ( n\right) -\ln \left ( n-1\right) } {n-\left ( n-1\right) } 大于切线的斜率 \left ( \ln n\right) '=\dfrac {1} {n} 。 我们有 \ln n-\ln \left ( n-1\right) >\dfrac {1} {n} 我们累加 \sum \left ( \ln n-\ln \left ( n-1\right
  • 1-1+1-1+1-1+1. . . 这个无穷数列的值是什么?如何证明? - 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。
  • 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
  • Formal proof for $(-1) \\times (-1) = 1$ - Mathematics Stack Exchange
    Is there a formal proof for $(-1) \\times (-1) = 1$? It's a fundamental formula not only in arithmetic but also in the whole of math Is there a proof for it or is it just assumed?
  • False Proof of 1=-1 - Mathematics Stack Exchange
    Oh, it sounds like Ivm asking those questions rhetorically I'm not They are very subtle and difficult questions Ponder them and think about them Part of the problem is that we really abuse what a−−√ a means What does it mean? how many values does it have? Is it unambiguous in meaning?




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