The annual rate of increase of an investment's value is proportional to its value, specifically 3.5% of the value. V V\,V is the value in thousands of pounds and t t\,t is the time in years.
Write down a differential equation for this relationship.
Show that V=Ae0.035tV = Ae^{0.035t}V=Ae0.035t where A A\,A is a constant.
Given that the initial value of the investment is £12,000. Find the value after 5 years, giving your answer to the nearest £10.
864 exam-style questions on Edexcel A Level Maths Integration, covering 11.1 Integrating Standard Functions, 11.2 Integrating f(ax + b), 11.3 Using Trigonometric Identities, 11.4 Reverse Chain Rule, 11.5 Integration by Substitution, 11.6 Integration by Parts, 11.7 Partial Fractions, 11.8 Finding Areas, 11.9 The Trapezium Rule, 11.10 Solving Differential Equations, and 11.11 Modelling with Differential Equations. Each one has a worked solution and a mark scheme showing where the marks go.