Inverse functions (AQA GCSE Further Maths): Quizzes

Undoes what the original function does

It must be one-to-one

Same output for different inputs

Interchange x and y

$f^{-1}(x) = \frac{x - 3}{2}$

$y = x$

The range of $f^{-1}(x)$

The inverse function

Check $f(f^{-1}(x)) = x$ and vice versa

$(b, a)$

$f^{-1}(x) = x - 2$

$x \geq 0$ or $x \leq 0$