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arithmet'ic progres'sion




a sequence in which each term is obtained by the addition of a constant number to the preceding term, as 1, 4, 7, 10, 13, and 6, 1, -4, -9, -14. Also called ar'ithmet'ic se'ries.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

arithmetic mean-arium
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