Odpowiedź:
[tex]a)\ \ (-2\frac{1}{2})^5\cdot(\frac{2}{5})^8=-(\frac{5}{2})^5\cdot(\frac{5}{2})^{-8}=-(\frac{5}{2})^{5-8}=-(\frac{5}{2})^{-3}=-(\frac{2}{5})^3\\\\\\b)\ \ (\frac{1}{2})^5\cdot2^5\cdot4^5\cdot(\frac{1}{4})^5=(\frac{1}{\not2_{1}}\cdot\not2^1\cdot\not4^1\cdot\frac{1}{\not4_{1}})^5=1^5[/tex]
