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Discover revision notes, exam questions, past papers, flashcards and A function is a combination of one or more mathematical operations that takes a set of numbers and changes them into another set of numbers It may be thought of as a mathematical “machine” For An inverse function does the exact opposite of the function it came from For example, if the function “doubles the number and adds 1” then its inverse is “subtract 1 and halve the result” It is the inverse An inverse function does the exact opposite of the function it came from For example, if the function “doubles the number and adds 1” then its inverse is “subtract 1 and halve the result” It is the inverse The domain of an inverse function is the range of the original function, therefore [1] Write down the domain and range of the function f ( x ) . uk IB Maths AI SL exam revision with questions, model answers & video solutions for Linear Functions & Graphs. 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