Question

calcule as potências (-2/5)-³​

Answer 1

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

Decimal: 15.625