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\left\{\mathrm{f}\left(\mathrm{b}_{1}\right), \mathrm{f}\left(\mathrm{b}_{2}\right), \mathrm{f}\left(\mathrm{b}_{3}\right), \mathrm{f}\left(\mathrm{b}_{4}\right), \ldots\right\}=\left\{2,2.5,2.67,2.75,2.8, \ldots, 3-\frac{1}{\mathrm{n}}, \ldots\right\}