等比級數 děng bǐ jí shù

DEFINITIONS

  1. geometric series (such as 1+2+4+8+...)

CHARACTERS

等 děng
HSK 2
rank, grade; wait; equal; 'etc.'
比 bǐ
HSK 2
to compare, liken; comparison; than
級 jí level, rank, class; grade
數 shù number; several; count; fate