Here are the first 5 terms of a quadratic sequence.
-8 2 16 34 56
Write the n n\,nth term in the form an2+bn+can^2 + bn + can2+bn+c.
Hence, determine whether 272 is a term in the sequence.
201 exam-style questions on OCR GCSE Maths The Nth Term of a Quadratic Sequence. Each one has a worked solution and a mark scheme showing where the marks go.