Prosze to na jutro ! Proszę o zad 15 !! Daje Naj !!!!

[latex]1+frac{4}{1+frac{4}{1+frac{2}{1+2}}}=1+frac{4}{1+frac{4}{1+frac{2}{3}}}=[/latex] [latex]1+frac{4}{1+frac{4}{1frac{2}{3}}}=1+frac{4}{1+frac{4}{frac{5}{3}}}=[/latex] [latex]1+frac{4}{1+4 cdot frac{3}{5}}=1+frac{4}{1+ frac{12}{5}}=[/latex] [latex]1+frac{4}{1 frac{12}{5}}=1+frac{4}{ frac{17}{5}}=[/latex] [latex]1+4cdot frac{5}{17}=1+frac{20}{17}=[/latex] [latex]1frac{20}{17}=2 frac{3}{17}=2,17...<2,2[/latex]