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2+4+6+.....+100 =?
Faceti cu metoda lui Gauss .
Dau COROANA!


Răspuns :

2×(1+2+3+4+............+50)
2×50×51:2.
2×2550=5100
2+4+6+...+100=2•(1+2+3+...+50)

1+2+3+...+50=[50•(50-1)]:2=(50•49):2=2450:2=1225

2+4+6+...+100=2•1225=2450
Sper ca te-am ajutat