Here are the first 5 terms of a quadratic sequence.
-8 -4 4 16 32
Show that the n n\,nth term is 2n2−2n−82n^2 - 2n - 82n2−2n−8
Hence, determine whether 256 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.