x

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 $f (3)$ , the 3 is the input and the value you get after applying the rule is the output.

Inverse and Composite Functions Lesson

GCSE
Maths
Inverse and Composite Functions

Step-by-step lessons covering Eduqas GCSE Maths Inverse and Composite Functions for Foundation and Higher tier. Each lesson works through exam-style questions in Component 1 and Component 2 format. 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.

Lessons

x

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 $f (3)$ , the 3 is the input and the value you get after applying the rule is the output.

Inverse and Composite Functions Lesson

GCSE
Maths
Inverse and Composite Functions

Step-by-step lessons covering Eduqas GCSE Maths Inverse and Composite Functions for Foundation and Higher tier. Each lesson works through exam-style questions in Component 1 and Component 2 format. 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.