Răspunsuri

2014-10-24T18:23:03+03:00
a=2003+2*(1+2+....+2002)=2003+2(2002*2003:2)=2003(1+2002)=2003*2003=2003² care este patrat perfect
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2014-10-24T18:30:55+03:00
Se aplica suma lui Gauss S=1+2+...+n= n*(n+1)/2
1+2+...+2002=2002*2003/2
2003+2*2002*2003/2=2003+2002*2003=2003(1+2002)=2003^2
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