Question

FOTO DAS PERGUNTAS ACIMA ⬆️​ É PARA 23:00!!!!

Answer 1

Olá,

a) $(-\frac{3}{5} )^{-3}$= $(-\frac{5}{3})^{3}$=  $(-\frac{5}{3})$ × $(-\frac{5}{3})$ × $(-\frac{5}{3})$ = $\frac{-50}{-27}$

b) $(-\frac{2}{7} )^{-2}$ = $(-\frac{7}{2})^{2}$ = $(-\frac{7}{2})^{2}$ × $(-\frac{7}{2})^{2}$ =  $\frac{49}{4}$

c) $(\frac{8}{9} )^{-1}$ =  $(\frac{9}{8})^{1}$ = $\frac{9}{8}$

d) $(\frac{1}{5})^{-3}$ = $(\frac{5}{1})^{3}$ =  $(\frac{5}{1})^{3}$ × $(\frac{5}{1})^{3}$ × $(\frac{5}{1})^{3}$ = $\frac{125}{1}$

e $(-\frac{1}{2})^{-2}$ = $(-\frac{2}{1})^{2}$ =  $(-\frac{2}{1})^{2}$ × $(-\frac{2}{1})^{2}$ = $\frac{4}{1}$

f) $(-\frac{2}{5})^{-2}$ = $(-\frac{5}{2})^{2}$ = $(-\frac{5}{2})$ × $(-\frac{5}{2})$ = $\frac{25}{4}$

Mirelle.