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(3supra5)la puterea0+3supra5la puterea1+3supra5la puterea 2

Răspuns :

(3/5)^0 + (3/5)^1 + (3/5)^2 =

= 1 + 3/5 + 9/25 =

= (25 + 15 + 9)/25 =

= 49/25