Here are the first 5 terms of a quadratic sequence.
-8 2 16 34 56
Find the first differences and the second difference.
Show that the n n\,nth term is 2n2+4n−142n^2 + 4n - 142n2+4n−14
Hence, determine whether 272 is a term in the sequence.
201 exam-style questions on Eduqas GCSE Maths The Nth Term of a Quadratic Sequence. Each one has a worked solution and a mark scheme showing where the marks go.