Pure Mathematics 1 1.6 Series 1.6.3 Geometric progressions Key ConceptsLearn FirstLoading… Key FormulasKnow TheseLoading… Common MistakesAvoid TheseLoading… StrategyApply ThisLoading…9709-P1-SUB-1.6.3-115 QuestionsLoading… 9709-P1-SUB-1.6.3-215 QuestionsLoading…