inverse functions
What inverse functions means in Mathematics GCSE, as defined for AQA, Pearson Edexcel.
Definitions of inverse functions
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Reference: AQA
The reverse process that reverses the original function, so applying a function then its inverse returns the original input.
The inverse f⁻¹(x) undoes f; to find it, write y = 3x − 4, rearrange to make x the subject, then swap the letters.
Topics that use inverse functions
- Notation, vocabulary and manipulation (AQA GCSE)
- Algebra - Notation, vocabulary and manipulation (Pearson Edexcel GCSE)
Related terms
- algebraic equivalence
- algebraic notation
- composite functions
- difference of two squares
- equation
- expanding brackets
- Expression
- factorising quadratics
Using inverse functions in the exam
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