Sequences

Sequences require students to identify term-to-term structure, derive nth-term rules, compare linear and quadratic patterns, and justify rules from numerical evidence and position numbers. The topic separates recursive descriptions from explicit nth-term formulae, so answers should explain both the pattern and the rule used to generate terms. Within Sequences, revision should focus on recognising the mathematical structure before choosing a method, because similar-looking questions can test different skills. A strong answer states the representation being used, shows the key calculation or reasoning step, and checks that the final answer matches the wording, units and accuracy of the question. Common mistakes usually come from applying a familiar procedure without checking the condition in the question, so each step should be linked back to the information given.