Question

ajude please
(7/9)-²

Answer 1

→ Cálculo :

$\large { \ {\boxed { \begin{array}{lr} {\left ( \frac{7}{9} \right )^{-2} = } \\ \\ {\left ( \frac{9}{7} \right )^{2} = }\\\\{\frac{9^{2} }{7^{2} }= }\\\\\boxed{\red{ \: \: \frac{81}{49} \: \: }} \rm \ { \Leftrightarrow} \ Resposta \\ \end{array}}}}$

Answer 2

Olá ! (^_-)

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$\large \sf \displaystyle {\left ( \dfrac{7}{9} \right )^{-2} =}$

$\large \sf \displaystyle {\left ( \dfrac{9}{7} \right )^{2} =}$

$\large \sf \displaystyle {\frac{9^{2} }{7^{2} } =}$

$\large \sf \displaystyle {\frac{9 \cdot 9 }{7 \cdot 7 }= }$

$\large \sf \displaystyle \boxed {\red{ \ \frac{81}{49} \ }}$

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Espero ter ajudado! ❤️