V2EX common difference

Common Difference

释义 Definition

(等差数列的)公差:相邻两项之间保持不变的差值。常用于描述等差数列(arithmetic progression/sequence)。

发音 Pronunciation (IPA)

/kmn dfrns/

例句 Examples

The common difference is 3, so each term increases by 3.
公差是 3,所以每一项都增加 3。

If you know the first term and the common difference, you can find any term in the arithmetic sequence using a formula.
如果你知道首项和公差,就可以用公式求出等差数列中的任意一项。

词源 Etymology

common 来自拉丁语 communis,有“共同的、共有的”之意;difference 来自拉丁语 differentia,表示“差异、差”。在数学语境中,common difference 直译为“共同的差”,指等差数列中每一对相邻项共享的同一个差值。

相关词 Related Words

文学与著作中的用例 Literary Works

  • A Course of Pure Mathematics(G. H. Hardy):在数列章节讨论等差数列时使用相关术语。
  • Concrete Mathematics(Graham, Knuth, Patashnik):在离散数学与求和问题中涉及等差结构与相邻差值的概念。
  • Elementary Algebra(常见代数教材多版本):在“Arithmetic Progressions/Sequences”章节中常出现 “common difference”。
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