The formula for the nnn-th term L L\,L of a sequence is L=a+ndL = a + ndL=a+nd.
Make n n\,n the subject of the formula L=a+ndL = a + ndL=a+nd
Practise OCR GCSE Maths Rearranging Harder Formulae with exam-style questions for Foundation and Higher tier. 52 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.