Here are the first 5 terms of a quadratic sequence.
7 15 25 37 51
Find an expression, in terms of nnn, for the n n\,nth term of this sequence, in the form an2+bn+can^2+bn+can2+bn+c, where aaa, b b\,b and c c\,c are integers.
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.