1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 14:58:46
1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少?1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少?1/1x3+1/3x5+1/5x7+…+1/2011x201

1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少?
1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少?

1/1x3+1/3x5+1/5x7+…+1/2011x2013是多少?
=(1-1/3+1/3-1/5+1/5……+1/2011-1/2013)=(1-2013)除以2/2013=2012/2013

=(1-1/3+1/3-1/5+1/5……+1/2011-1/2013)=(1-2013)除以2/2013=2012/2013