分析:根据平方差公式(a+b)(a-b)=a2-b2,即可求出答案.
解答:解:1
2-2
2+3
2-4
2+5
2-6
2+…+2005
2-2006
2+2007
2-2008
2=-[(2
2-1
2)+(4
2-3
2)+(6
2-5
2)+…+(2006
2-2005
2)+(2008
2-2007
2)],
利用平方差公式1
2-2
2+3
2-4
2+5
2-6
2+…+2005
2-2006
2+2007
2-2008
2=-[(=-[(2
2-1
2)+(4
2-3
2)+(6
2-5
2)+…+(2006
2-2005
2)+(2008
2-2007
2)]
=-[(2-1)(2+1)+(4-3)(4+3)+(6-5)(6+5)+…+(2006-2005)(2006+2005)+(2008-2007)(2008+2007)]
=-(1+2+3+4+…+2006+2007+2008=-
=-2 017036.
故答案为:-2 017036.
点评:本题考查了平方差公式,难度不大,关键是找出题目的规律再进行解答.