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Determinati numarul x:
(2 supra 3) la puterea ''x'' = 32 supra 243
(3 supra 2) la puterea ''x'' = 2,25
(1 supra 7) la puterea ''x'' = 2 supra 98
Repede daca se poate!


Răspuns :

(2/3)^x = 32/243
(2/3)^x = (2/3)^5
x = 5

(3/2)^x = 2,25
(3/2)^x = 225/100
(am simplificat cu 25,fractia 225/100)
(3/2)^x = 9/4
(3/2)^x = (3/2)^2
x = 2

(1/7)^x = 2/98
(am simplificat cu 2 , fractia 2/98)
(1/7)^x = 1/49
(1/7^x = (1/7)^2
x = 2