等比数列
ChineseEdit
For pronunciation and definitions of 等比数列 – see 等比數列 (“geometric progression”). (This term, 等比数列, is the simplified form of 等比數列.) 
Notes:

JapaneseEdit
Kanji in this term  

等  比  数  列 
とう Grade: 3 
ひ Grade: 5 
すう Grade: 2 
れつ Grade: 3 
on’yomi 
NounEdit
等比数列 • (tōhisūretsu)
 (mathematics) geometric sequence
 Synonym: 幾何数列