Question

cat face :
3 la puterea -x = 1 supra 27 la puterea -1 ??

Answer 1

$3^{-x}=(\frac{1}{27})^{-1}=\ \textgreater \ 3^{-x}=27=\ \textgreater \ 3^{-x}=3^3=\ \textgreater \ -x=3=\ \textgreater \ x=-3.$

Answer 2

1/27^(-1)=1/1/27=27 3^(-x)=27 x=-3