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
- That constant difference is known as the common difference of the sequence
- You need to know the nth term formula for an arithmetic sequence
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- 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. 
Worked Example
转载自savemyexams
