It's A-level results day and nervous students around the country will finally learn how they did in their exams. While some will pass with flying colours, others will go through clearing and some will ...

This is a preview. Log in through your library . Abstract Advanced-level (A-level) mathematics is a high-profile qualification taken by many school leavers in England, Wales, Northern Ireland and ...

Save guides, add subjects and pick up where you left off with your BBC account. A recurrence relation is a sequence that gives you a connection between two consecutive terms. Practise modelling ...