Here are the first 5 terms of a quadratic sequence.
-2 -1 1 4 8
Find the first differences and the second difference.
Hence, find an expression, in terms of nnn, for the n n\,nth term of this 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.