Tính: a) (-1/3) ^4; (-2/3)^3; (2(1/2))^3; (-0,2)^3; (-125,9)^0

* Hướng dẫn giải

a) ${\left(\frac{-1}{3}\right)}^4={\left(\frac{1}{3}\right)}^4=\frac{1^4}{3^4}=\frac{1}{81}$

${\left(\frac{-2}{3}\right)}^3=\frac{{(-2)}^3}{3^3}=\frac{-8}{27}$

${\left(2\frac{1}{2}\right)}^3={\left(\frac{5}{2}\right)}^3=\frac{5^3}{2^3}=\frac{125}{8}$

${(-0,2)}^3={\left(\frac{-1}{5}\right)}^3=\frac{-1^3}{5^3}=\frac{-1}{125}$

${(-125,9)}^0=1;{(0,3)}^4={\left(\frac{3}{10}\right)}^4=\frac{3^4}{{10}^4}=\frac{81}{10000}$