单词	arithmetic progression
释义	arithmetic progression noun : a progression (such as 3, 5, 7, 9) in which the difference between any term and its predecessor is constant Example Sentences Recent Examples on the Web This kind of sequence is called an arithmetic progression. Quanta Magazine, 6 Feb. 2019 In mathematics, this is called an arithmetic progression—a sequence in which the numbers increase by the same amount at each step. Eugenia Cheng, WSJ, 5 Dec. 2018 Word History First Known Use 1704, in the meaning defined above
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