问题描述:
1/2+(1/3+2/3)+(1/4+2/4+3/4)+…(1/2006+2/2006+3/2006+…+2005/2006)=?
1/2+〔1/3+2/3〕+〔1/4+2/4+3/4〕+…+〔1/2006+2/2006+…+2004/2006+2005/2006〕
=0.5+1+1.5+.1003
=2006*(0.5+1003)/2
=1006510.
1/2+〔1/3+2/3〕+〔1/4+2/4+3/4〕+…+〔1/2006+2/2006+…+2004/2006+2005/2006〕
=0.5+1+1.5+.1003
=2006*(0.5+1003)/2
=1006510.
问题解答:
我来补答展开全文阅读