\[q = 0,1;\]
\[S = \frac{0,06}{1 - 0,1} = \frac{0,06}{0,9} = \frac{6}{90} = \frac{1}{15};\]
\[5 + \frac{1}{10} + \frac{1}{15} = 5 + \frac{5}{30} = 5\frac{1}{6};\]
\[5,1(6) = 5\frac{1}{6}.\]