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3 la puterea -5 * 3 la puterea 11 totul supra 9 la puterea 2

Răspuns :

[tex]\dfrac{3^{-5}\cdot3^{11}}{9^2}=\dfrac{3^{-5+11}}{(3^2)^2}=\dfrac{3^6}{3^4}=3^{6-4}=3^2=9[/tex]