等差级数

Traditional form:

等差級數

Pinyin (reading):

děngchājíshù

Definitions:

• arithmetic series (such as 2+4+6+8+...)

Characters:

• 等 - rank, grade; same, equal; to wait
• 差 - difference, gap; almost, nearly; in error; an officer
• 级 - level, rank; class, grade
• 数 - count, number, several

Traditional characters:

• 等 - rank, grade; same, equal; to wait
• 差 - difference, gap; almost, nearly; in error; an officer
• 級 - level, rank; class, grade
• 數 - count, number, several