单词	arithmetic series
释义	arithmetic series A series a1 + a2 + a3 + … (which may be finite or infinite) in which the terms form an arithmetic sequence. Let sn be the nth partial sum (that is, the sum of the first n terms). Then sn is given by the formula where a is the first term and l is the last (nth) term. In particular, when a = 1 and the common difference d = 1:
随便看	Karmarkar's algorithm kelvin Kelvin, Lord Kendall's rank correlation coefficient Kepler conjecture Kepler, Johannes Kepler's laws of planetary motion kernel ket key kg Khwārizmī, Muhammad ibn Mūsā al‐ kilogram kilo‐ kilo‐ kinematics kinetic energy kinetic friction Kingman, Sir John Frank Charles Kirchoff's Theorem kite Klein bottle Klein, (Christian) Felix Klein four‐group Kline, Morris

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