Exam-Style Question on Quadratic Sequence
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 543. This question is similar to one that appeared on a GCSE Higher paper in 2019. The use of a calculator is allowed.
Here are the first six terms of a quadratic sequence.$$-1, 8, 21, 38, 59, 84$$
Find an expression, in terms of \(n\), for the \(n\)th term of this sequence.
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If you need more practice try the interactive exercise Quadratic Sequences.
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