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等比級数 (touhikyuusuu) Japanese meaning | Kotomora

等とう比ひ級きゅう数すう

と

う

ひ

きゅ

う

す

う

Meanings

1

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?

Kanji

等etc., and so forth, class (first)
比compare, race, ratio
級class, rank, grade
数number, strength, fate

Related words

等とう差さ数すう列れつ
等差数列 is an arithmetic sequence (constant difference), while 等比級数 is a geometric series (constant ratio).
等とう比ひ数すう列れつ
等比数列 is a geometric sequence (list of terms), while 等比級数 is the sum of those terms.

Built from

等とう比ひ+級きゅう数すう

Etymology

Compound of 等比 (geometric ratio) and 級数 (series). The term is a direct mathematical coinage from Chinese-character components.