2006X2007X2008X2009+1=
3个回答
2010-06-28
展开全部
解:设2007=a
则
2006X2007X2008X2009+1
=(a-1)a(a+1)(a+2)+1
=[(a-1)(a+2)][a(a+1)]+1
=[(a²+a)-2](a²+a)+1
=(a²+a)²-2(a²+a)+1
=(a²+a-1)²
=(2007²+2007-1)²
=16241343303025
则
2006X2007X2008X2009+1
=(a-1)a(a+1)(a+2)+1
=[(a-1)(a+2)][a(a+1)]+1
=[(a²+a)-2](a²+a)+1
=(a²+a)²-2(a²+a)+1
=(a²+a-1)²
=(2007²+2007-1)²
=16241343303025
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询