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Calculeaza sumele:2+4+6+8+......+2018

Răspuns :

2(1+2+3+.............+1009)=
2x(1+1009)x1009:2=1010x1009=1019090

[tex] \frac{(2018 + 2) }{2} \times \frac{2018}{2} = 1010 \times 1009 = 1019090[/tex]
Sper că te-am ajutat!!!