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Cel mai inteligent răspuns!
2014-10-03T19:13:49+03:00
Un numar impar este de forma 2x+1
2x+1+2x+3+2x+5+..............+2x+10=100
10.2x+(1+3+5+..........+19)=100
20x+20.5=100
x=0
1+3+5+7+9+11+13+15+17+19=20.5=100


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