“arithmetic series”的概念、定义、翻译、参考文献-科学参考

　

单词	arithmetic series
释义	arithmetic series Physics A series or progression of numbers in which there is a common difference between terms, e.g. 3, 9, 15, 21,… is an arithmetic series with a common difference of 6. The general formula for the nth term is $[a + (n - 1) d]$ and the sum of n terms is $n [2 a + (n - 1) d] / 2 .$ Compare geometric series. Mathematics A series a₁ + a₂ + a₃ + … (which may be finite or infinite) in which the terms form an arithmetic sequence. Let s_n be the nth partial sum (that is, the sum of the first n terms). Then s_n is given by the formula $s_{n} = \frac{1}{2} n (a + l)$ where a is the first term and l is the last (nth) term. In particular, when a = 1 and the common difference d = 1: $\sum_{r = 1}^{n} r = 1 + 2 + \dots + n = \frac{1}{2} n (n + 1) .$
随便看	Fresnel diffraction Fresnel factor Fresnel lens Fresnel zone freta Fretted and Chaotic Hummocky Terrain fretum Freudenthal, Hans (1905–90) Freud, Sigmund Freud, Sigmund (1856–1939) Freundlich adsorption isotherm Freundlich, Herbert Max Finlay Freundlich isotherm Freyberg, Bernard Cyril, 1st Baron (1889–1963) Frey’s curve friable friction frictional angle frictional electricity frictional head frictional resistance, angle of frictional unemployment friction coefficient friction drive friction factor

　

科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。

　

Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号更新时间：2025/2/6 1:50:10