Here are the first 5 terms of a quadratic sequence.
6 11 20 33 50
Show that the n n\,nth term is 2n2−n+52n^2 - n + 52n2−n+5
Hence, determine whether 125 is a term in the sequence.
Practise OCR GCSE Maths The Nth Term of a Quadratic Sequence with exam-style questions for Foundation and Higher tier. 48 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.