Question

(7/9)^-2=
me ajudem a resolver ​

Answer 1

Olá! (^_-)

$\large \sf \displaystyle { \sf \left ( \dfrac{7}{9} \right )^{ - 2} = \left ( \dfrac{9}{7} \right ) ^{2} = \frac{9 {}^{2} }{7 {}^{2} } = \frac{9 \cdot9}{7 \cdot7} = \boxed{ \red{\frac{81}{49} }}}$

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Espero ter ajudado! ❤️