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计算题目1/2004x2005+1/2005x2006+1/2006x2007+1/2007x2008+1/2008x2009+1/2009
题目详情
计算题目1/2004x2005+1/2005x2006+1/2006x2007+1/2007x2008+1/2008x2009+1/2009
▼优质解答
答案和解析
1/2004x2005+1/2005x2006+1/2006x2007+1/2007x2008+1/2008x2009+1/2009
=1/2004-1/2005+1/2005-1/2006+1/2006-1/2007+1/2007-1/2008+1/2008-1/2009+1/2009
=1/2004
=1/2004-1/2005+1/2005-1/2006+1/2006-1/2007+1/2007-1/2008+1/2008-1/2009+1/2009
=1/2004
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