AQA GCSE Mathematics · 8300
Specification A24 · Paper 1, Paper 2, Paper 3
Revise: Quadratic and Surd SequencesTo investigate how its terms change, subtract each term from the next. These results are the first differences.
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GCSE Mathematics · key term
The results obtained by subtracting each term of a sequence from the following term.
Used by AQA and OCR
Specification A24 · Paper 1, Paper 2, Paper 3
Revise: Quadratic and Surd SequencesTo investigate how its terms change, subtract each term from the next. These results are the first differences.
Specification 6.06a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
The changes found by subtracting each term of a sequence from the term immediately after it.
Revise: Quadratic SequencesFor a linear sequence, the first differences are constant. In a quadratic sequence, the first differences change, but their differences—the second differences—are constant.
Write first differences directly beneath the original terms and second differences beneath those. A constant first difference means linear; a constant second difference means quadratic.
When continuing a quadratic sequence, extend the constant second-difference row first, then work upwards to the next first difference and next term.
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