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Inverse and Composite Functions
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Function notation and inputs

Function notation and inputs

Function machine with an input x going through f to output f(x), an inverse arrow taking the output back to x, and a composite chain x through f then g to give g(f(x)).

A function is a rule that gives exactly one output for each input. In f(3)f(3)f(3), the 3 is the input and the value you get after applying the rule is the output.

Inverse and Composite Functions Lesson

  1. GCSE
  2. /Maths
  3. /Inverse and Composite Functions

Step-by-step lessons on CCEA GCSE Maths Inverse and Composite Functions. Each one builds up to exam-style questions. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.