Question

помогите решить!!!! ​

Answer 1

$\displaystyle\bf\\\Bigg(\frac{11}{13} \Bigg)^{-6} :\Bigg(\frac{11}{13} \Bigg)^{-4} =\Bigg(\frac{11}{13} \Bigg)^{-6-(-4)} =\Bigg(\frac{11}{13} \Bigg)^{-6+4} =\Bigg(\frac{11}{13} \Bigg)^{-2} =\\\\\\=\Bigg(\frac{13}{11} \Bigg)^{2}=\frac{169}{121}$