GCSE Maths (Edexcel)

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Inverse Functions

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Algebra Notation, Vocabulary and Manipulation

Inverse Functions

4:17 Inverse & Composite Functions
Spec A7
Previous Functions as Algebraic Expressions Next Finding Inverse Functions
  • Inverse functions do the opposite of the original function
  • The inverse of a function is written as f^-1(x)
  • The domain and range are swapped for the inverse function
  • Each operation in the original function is inverted and reversed to find the inverse function
  • The inverse function needs to undo the effects of the original function
  • It is important to double check the inverse function using a trial input to confirm correctness.

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