The harmonic mean of two positive integers is 2006. Find the greatest possible value of their
arithmetic mean.
arithmetic mean.
Define \(f: \mathbb{R} \rightarrow \mathbb{R}\) by \[f(x)= \begin{cases}(1-\cos x) \sin \left(\frac{1}{x}\right), & x \neq 0 \\ 0, &a...
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