9709 P12 - Jun 2011 - Q6
698
The function \(f\) is defined by \(f : x \mapsto \frac{x+3}{2x-1}\), \(x \in \mathbb{R}, x \neq \frac{1}{2}\).
(i) Show that \(ff(x) = x\).
(ii) Hence, or otherwise, obtain an expression for \(f^{-1}(x)\).
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