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calculati :
(1+2+........+10434)/10435
(1+2+........+300)/903

Răspuns :

Sirghipaula
(1+2+...+10434)/10435=[(1+10434)*10434]/2* 1/10435= 10435 * 5214/10435=5214 (1+2+..+300)/903=[(1+300)*300]/2*1/903= (301*150)/903=50

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