等とう比ひ級きゅう数すう

noun

geometric series

Mathematical term for a series where each term is multiplied by a constant ratio. Used in algebra and calculus contexts.

• 等とう比ひ級きゅう数すうの和わを求もとめる公こう式しきを覚おぼえていますか。

  Do you remember the formula for the sum of a geometric series?