CIE A Level Maths: Pure 1复习笔记4.2.1 Arithmetic Sequences

What do I need to know about arithmetic progressions?

• In an arithmetic progression (also called arithmetic sequence), the difference between consecutive terms in the sequence is constant

• That constant difference is known as the common difference of the sequence
• You need to know the n^th term formula for an arithmetic progression

• • a is the first term
  • d is the common difference