A ____ series is the sum of n terms, if n is a positive integer (6)

I believe the answer is:

finite

(Other definitions for finite that I've seen before include "Not inexhaustible" , "Fixed" , "Having a limit, not completely open-ended" , "Having a beginning and an end" , "Having an end or limit" .)

I've seen this clue in The Times and The Sunday Times.

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