Additional Mathematics (4037) Topic 14 · Calculus 14.4 Rates of change, approximations and optimisation Key ConceptsLearn FirstLoading… Key FormulasKnow TheseLoading… Common MistakesAvoid TheseLoading… StrategyApply ThisLoading…4037-SUB-14.4-1Non-CalculatorLoading… 4037-SUB-14.4-2CalculatorLoading…