CIE A Level Maths: Pure 1复习笔记4.3.1 Geometric Sequences
Geometric Sequences
What do I need to know about geometric progressions?
- In a geometric progression (also called geometric sequence) there is a common ratio between consecutive terms in the sequence
- You need to know the nth term formula for a geometric progression
a is the first term
-
- r is the common ratio
Exam Tip
- The formula is given in the formula booklet
- If you know two terms in a geometric sequence you can find a and r using simultaneous equations.
Worked Example
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