Arithmetic Sequences (Edexcel A Level Maths) : Revision Note
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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
a is the first term
d is the common difference
Examiner Tips and Tricks
If you know two terms in an arithmetic sequence you can find a and d using simultaneous equations.

Worked Example

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