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Arithmetic Sequences (Edexcel International AS Maths): Revision Note

Exam code: XMA01

Roger B

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Roger B

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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

Arithm Seq Illustr, A Level & AS Level Pure Maths Revision Notes

  • That constant difference is known as the common difference of the sequence

  • You need to know the nth term formula for an arithmetic sequence  

    u subscript n equals a plus left parenthesis n minus 1 right parenthesis d

    • 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. 

Arithm Seq Simult, A Level & AS Level Pure Maths Revision Notes

Worked Example

Arithm Seq Example, A Level & AS Level Pure Maths Revision Notes
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Roger B

Author: Roger B

Expertise: Maths Content Creator

Roger's teaching experience stretches all the way back to 1992, and in that time he has taught students at all levels between Year 7 and university undergraduate. Having conducted and published postgraduate research into the mathematical theory behind quantum computing, he is more than confident in dealing with mathematics at any level the exam boards might throw at you.