Question

calcule a potencia (-2/3) elevado a -3 + 8/6 elevado a -1 - 4

Answer 1

Olá.

$\mathsf{(\dfrac{-2}{3})^{-3}+(\dfrac{8}{6})^{-1}-4=\ \ }\mathsf{\dfrac{3^3}{-2^3}+\dfrac{6}{8}-4=\ \ }\mathsf{\dfrac{27}{8}+\dfrac{6}{8}+4=\ \ }\\\\\\\mathsf{\dfrac{27+6+8\cdot4}{8}=\ \ }\mathsf{\dfrac{27+6+32}{8}=}\mathsf{\dfrac{65}{8}=\ \ }\boxed{\boxed{8,125}}}$

Qualquer dúvida, deixe nos comentários.
Bons estudos.