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Let $f(x) : \mathbb{R} \to \mathbb{R}$ be a function such that \[\frac{f(x) f(y) - f(xy)}{3} = x + y + 2\]for all $x,$ $y \in \mathbb{R}.$ Find $f(x).$

 Mar 10, 2021
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The function is f(x) = x + 1.

 Mar 21, 2021

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