AQA A Level Maths: Pure复习笔记4.4.1 Geometric Sequences
Geometric Sequences
What do I need to know about geometric sequences?
- In a geometric sequence, there is a common ratio between consecutive terms in the sequence
- You need to know the nth term formula for a geometric sequence
-
- a is the first term
- r is the common ratio
Exam Tip
If you know two terms in a geometric sequence you can find a and d using simultaneous equations. 
Worked Example
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