Zadanie [(1 \frac{1}{3})^{-1} +2^{-2}]^2
źródło:
[(1 \frac{1}{3})^{-1} +2^{-2}]^2 =[(\frac{4}{3})^{-1}+(\frac{1}{2})^2]^2=(\frac{3}{4}+\frac{1}{4})^2=(\frac{4}{4})^2=1^2=1