Odpowiedź:
[tex]a)\\\\(-\frac{2}{7})^2=(\frac{2}{7})^2=\frac{2^2}{7^2}=\frac{4}{49}\\\\(-\frac{3}{10})^3=-(\frac{3}{10})^3=-\frac{3^3}{10^3}=-\frac{27}{1000}\\\\\\b)\\\\(-0,2)^3=(-\frac{1}{5})^3=-\frac{1^3}{5^3}=-\frac{1}{125}\\\\(-0,15)^2=0,15^2=(\frac{3}{20})^2=\frac{3^2}{20^2}=\frac{9}{400}\\\\\\c)\\\\(-3\frac{1}{3})^3=(-\frac{10}{3})^3=-\frac{10^3}{3^3}=-\frac{1000}{27}=-37\frac{1}{27}\\\\(-2,5)^2=(\frac{25}{10})^2=(\frac{5}{2})^2=\frac{5^2}{2^2}=\frac{25}{4}=6\frac{1}{4}[/tex]
