The curve C C\,C has equation y=xx2+16\displaystyle y = \frac{x}{x^2+16}y=x2+16x.
Determine the coordinates and nature of the stationary points on CCC.
57 exam-style questions on OCR (MEI) A Level Maths 1.9.17 Concavity and the second derivative (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.