TMUA 2019 Paper 1 Question 8

The function $f$ is such that $0<f(x)<1$ for $0\le x\le 1$. The trapezium rule with $n$ equal intervals is used to estimate ${\int }_0^{1}f(x)dx$ and produces an underestimate. Using the same number of equal intervals, for which one of the following does the trapezium rule produce an overestimate?