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Arithmetic & Geometric series Proof Cheat Sheet
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Uploaded on
25-07-2026
Written in
2025/2026
This is a short and sweet cheat-sheet to help you to understand and remember the summation formulae for an A-Level pure mathematics exam. The document shows a clear step-by-step proof of the sum of an arithmetic series and the sum of a geometric series. There are also some extra bitesize details about a periodic sequence (The other type of sequence present on the WJEC spec) and the difference between convergent and divergent sequences.
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Written for
- Study Level
- A/AS Level
- Examinator
- WJEC
- Subject
- Mathematics
- Unit
- Series and Sequences
Document information
- Uploaded on
- July 25, 2026
- Number of pages
- 1
- Written in
- 2025/2026
- Type
- OTHER
- Person
- Unknown
Subjects
-
arithmetic
-
geometric
-
mathematics
-
a level
-
pure mathematics
-
revision notes
-
proofs
-
sum of a series
-
summation
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