A scientist records the number of microorganisms in a culture each hour. The first five results form a quadratic sequence.
5 12 25 44 69
Find an expression, in terms of nnn, for the n n\,nth term of this sequence.
[4]
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The Nth Term of a Quadratic Sequence Questions
48 exam-style questions on AQA GCSE Maths The Nth Term of a Quadratic Sequence. Each one has a worked solution and a mark scheme showing where the marks go.