\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Compute the unique fixed point \(\ell\) of \(f(x) = (x + 2)/(x + 3)\) on \([0, 1]\) (cf.\ previous exercise), and verify \(\ell \in [0, 1]\).
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