Here are the first 5 terms of a quadratic sequence.
2 10 24 44 70
Verify that 3n2−n3n^2 - n3n2−n is 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.