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([tex]\frac{1}{5}[/tex]) la puterea -5 x 25 la puterea -4 x 125

Răspuns :

[tex](\frac{1}{5}) ^{-5} \cdot 25^{-4}\cdot 125=5^5\cdot \frac{1}{(5^2)^4} \cdot 5^3 = \frac{5^8}{5^{8}}=\boxed{1}[/tex]