Question

alguém me ajuda

3^9x9^-2/27^7x81^-5​

Answer 1

3⁹×9-²/3²¹×9-¹⁰

3⁹×9-²+¹⁰/3²¹

9⁸/3¹²

3¹⁶/3¹²

3⁴

81

Resposta sera 81.

Espero ter ajudado ;)

Answer 2

Resposta:

$3^4$

Explicação passo-a-passo:

$\frac{3^9~*~9^{-2}}{27^7~*~81^{-5}}=\\\\Coloca~em~potencia~de~base~3:\\\\\frac{3^9~*~(3^2)^{-2}}{(3^3)^{7}~*~(3^4)^{-5}}=\\\\\frac{3^9~*~3^{-4}}{3^{21}~*~3^{-20}}=\\\\\frac{3^5}{3}=\\\\3^{5-1}=\\\\3^4$