[tex]b) \frac{1}{4} *(3+3: \frac{2}{0,(6)})=\frac{1}{4} *(3+3: \frac{2}{ \frac{2}{3}})= \\ \\ =\frac{1}{4} *(3+3* \frac{ \frac{2}{3} }{2} )=\frac{1}{4} *(3+3* \frac{2}{3}* \frac{1}{2})= \\ \\ = \frac{1}{4}*4=1. \\ \\ c) 2,1(3)* \frac{3}{ 2^{5}}+(\frac{1}{2}-\frac{1}{5})^{2}*2^{2}= \\ \\ =\frac{32}{15}*\frac{3}{32}+(\frac{5-2}{10})^{2}*4= \\ \\ =\frac{1}{5}+(\frac{3}{10})^{2}*4= \\ \\ =\frac{1}{5}+\frac{9}{100}*4=\frac{1}{5}+\frac{9}{25}=\frac{5+9}{25}=\frac{14}{25}.[/tex]
/robertinni
