The function f f\,f is such that
f(x)=3x−24 f(x) = \frac{3x - 2}{4} f(x)=43x−2Find f(−7)f(-7)f(−7)
Express the inverse function f−1f^{-1}f−1 in the form f−1(x)=…f^{-1}(x) = \dotsf−1(x)=…
The function g g\,g is such that
g(x)=19−x g(x) = \sqrt{19 - x} g(x)=19−xFind fg(3)fg(3)fg(3)
Which values cannot be included in any domain of ggg?
4 exam-style questions on CIE IGCSE Maths Inverse and Composite Functions. Each one has a worked solution and a mark scheme showing where the marks go.