\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Let \(f\) be a \(K_0\)-Lipschitz function on \([0, 1]\). Estimate \(\left| \int_0^1 f - \frac{1}{n} \sum_{k=0}^{n-1} f(k/n) \right|\) in terms of \(K_0\) and \(n\).
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