In mathematics, a functional equation is, in the broadest meaning, an equation in which one or several functions appear as unknowns. So, differential equations and integral equations are functional equations. However in this 'Crash Course' podcast we deal only with equations where functions such as f(x) are the unknowns to be found, which are a mainstay of Maths Olympiads and College Entrance Tests. The Gresty Academy series of 'A Crash Course in...' podcasts aim to help anybody who needs to understand and excel in a topic quickly. Hence in our podcasts there is very little general introductory irrelevant 'waffle', instead we dive straight into discussing and answering exam-style questions, specifically designed to highlight and illustrate the main knowledge, skills, techniques and tricks needed in order to get up to speed very quickly in the topic. Join the Gresty Academy YouTube channel to get access to perks: youtube.com/channel/UCuC1Ys-7XLOXPkfYx-Q3VBg/join