| 单词 | telescopic series | 
| 释义 | telescopic series [¦tel·ǝ´skäp·ik `sir´ēz]  MATHEMATICS The series whose nth term is 1/[(k + n - 1) (k + n )] = [1/(k + n - 1)] - [1/(k + n )], where k is not zero or a negative integer, and whose sum is 1/k.  | 
	
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