Given that k(x)=x2+2k(x) = x^2 + 2k(x)=x2+2 find:
k(5)k(5)k(5)
k(−4)k(-4)k(−4)
Solve: k−1(x)=10k^{-1}(x) = 10k−1(x)=10
32 exam-style questions on AQA GCSE Maths Inverse and Composite Functions. Each one has a worked solution and a mark scheme showing where the marks go.