2 + 4 + 6 + ......... + 2014 = 1 015 056
= 2 × ( 1 + 2 + 3 + ......... + 1007 ) =
= 2 × 1007 × ( 1 + 1 007 ) / 2 =
= 1 007 × 1 008 =
= 1 015 056
2+4+6+...+2014=
=2(1+2+3+...1007)=
=2*(1007*1008)/2=
=1007*1008
