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)
For this part, restrict the domain of k k\,k to x≥0x \geq 0x≥0.
Solve: k−1(x)=10k^{-1}(x) = 10k−1(x)=10
135 exam-style questions on OCR GCSE Maths Inverse and Composite Functions. Each one has a worked solution and a mark scheme showing where the marks go.