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determinati numarulnatural x stiind ca :
(0,5)^8·x^8=1


Răspuns :

(0,5)^8·x^8=1
(1/2)^8·x^8=1
1/2^8·x^8=1
x^8/2^8=1
x^8=1·2^8
x^8=2^8 → x=2