Modelling with Integration
In many of the examples of Chapters 8 and 9 the rate of change of a variable was modelled by some function which could involve the present value of the variable as well as the time t. In this chapter we deal with the slightly easier case where we have an explicit model in terms of t for the rate of change of our variable, y′ = f(t). To find an expression for the variable in terms of t we can then integrate to give
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