What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.3.8.1Differential equations• formulate a simple statement involving a rate of change as a differential equation The introduction and evaluation of a constant of proportionality, where necessary, is included.Syllabus objective3.8.2Differential equations• find by integration a general form of solution for a first order differential equation in which the variables are separable Including any of the integration techniques from topic 3.5 above.Syllabus objective3.8.3An initial condition to find a• use an initial condition to find a particular solutionSyllabus objective3.8.4Differential equations• interpret the solution of a differential equation in the context of a problem being modelled by the equation. Where a differential equation is used to model a 'real-life' situation, no specialised knowledge of the context will be required.Syllabus objective