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S=2+4+6+8+.................+2018 Suma gaos.......Multumesc mult

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In primul rand: Suma GAUSS !!!!!!!!!!!!!!!!!

S=2+4+6+...+2018
S=2*(1+2+3+...+1009)
S=2*(1009*1010:2)
S=2*(1009*505)
S=2*509545
S=1019090
S=2+4+6+8+.................+2018) 
S=2(1+2+..+1009)
S=2·(1009·1010:2)
S=1009·1010
S=1019090

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