NMTC Inter Level Problem 3 + Figure-It-Out Function! - Part 5: Inverses

Algebra Level 3

\[3f(x)-2f \left (\frac{1}{x} \right )=x\] For \(x \ne 0 \), if \(f : \mathbb R \rightarrow \mathbb R \) and it satisfy the equation above, find the value of \(f(4)\).

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