E urgent..va rog sa ma ajutati ...

Răspuns:
1+2+3+....+2017=2017×2018:2=1070306÷2=2035153(×)
2+4+6+....2018=1×2+2×2+2×3+......+1009×2=2×(1+2+3+...+1009)=2×1015=2030×2031÷2=206.1465
2035153
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2061465
sper ca e bn!