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calculați 18*9^2 pe 3^12

Răspuns :

[tex]\dfrac{18\cdot 9^2}{3^{12}} =\dfrac{2\cdot9\cdot9^2}{3^{2\cdot6}}=\dfrac{2\cdot9^3}{9^6}=\dfrac{2\cdot9^3}{ 9^3\cdot9^3}=\dfrac{2}{9^3}=\dfrac{2}{729}[/tex]