A function f:R∖{0}→Rf: \mathbb{R} \setminus \{0\} \to \mathbb{R}f:R∖{0}→R satisfies f(x)+2f(1/x)=3xf(x) + 2f(1/x) = 3xf(x)+2f(1/x)=3x. What is f(2)f(2)f(2)?
−1-1−1
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222
000