Calculati : (-1/2)^- 3 , ∛-125 , lg 1/1000

Răspuns :

[tex](-\frac{1}{2})^{-3}=((-\frac{1}{2})^{-1})^3=(-2)^3=-8\\ \\ \sqrt[3]{-125}=\sqrt[3]{-5^3}=-5\\ \\ lg\frac{1}{1000}=lg\frac{1}{10^3}=lg10^{-3}=-3[/tex]