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# Help pls :)

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Let x, y, and z be positive real numbers. Find the minimum value of $$(x + 2y + 4z) \left( \frac{4}{x} + \frac{2}{y} + \frac{1}{z} \right)$$.

Btw. I have to use the AM-GM inequality thingy. Help :)

May 26, 2021