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2+4+6...+2018 Gauss va rog

Răspuns :

=2*1+2*2+2*3+....+2*1009=
=2(1+2+3+...+1009)=
=2*(1009*1010:2)=
=1009*1010=
=1.019.090
2+4+6+...+2018=
2(1+2+3+...+1009)=
2*1014*1009:2=
Se simplifica 2 cu 2=>1014*1009=1,019,090

Sper ca te-am ajutat!