AQA A Level Maths: Pure复习笔记4.3.1 Arithmetic Sequences

Arithmetic Sequences

 

What do I need to know about arithmetic sequences?

  • In an arithmetic sequence, the difference between consecutive terms in the sequence is constant

 

4.4.1-Arithm-Seq-Illustr

  • That constant difference is known as the common difference of the sequence
  • You need to know the nth term formula for an arithmetic sequence
    • a is the first term
    • d is the common difference

Exam Tip

If you know two terms in an arithmetic sequence you can find a and d using simultaneous equations. 4.4.1-Arithm-Seq-Simult

Worked Example

4.4.1-Arithm-Seq-Example

转载自savemyexams

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