Second difference
What Second difference means in Mathematics GCSE, as defined for AQA, Pearson Edexcel.
Definitions of Second difference
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Reference: AQA
The difference found after writing the first differences, which is constant for a quadratic sequence.
The difference between consecutive first differences: u_(n+2) − 2u_(n+1) + u_n.
Topics that use Second difference
- Sequences (AQA GCSE)
- Algebra - Sequences (Pearson Edexcel GCSE)
Related terms
- coefficient of n²
- Common ratio
- Fibonacci-type sequence
- First difference
- position-to-term rule
- quadratic sequence
- Sequence
- term-to-term rule
Using Second difference in the exam
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