1⼀1*3+1⼀3*5+1⼀5*7+.......+1⼀2011*2013等于多少

2024-11-08 03:15:43
推荐回答(2个)
回答1:

1/1*3+1/3*5+1/5*7+.......+1/2011*2013
=(1-1/3)+(1/3-1/5)+(1/5-1/7)+......+(1/2011-1/2013)
=1-1/3+1/3-1/5+1/5-1/7+.....+1/2011-1/2013
=1-1/2013
=2012/2013

回答2:

=(1-1/3)+(1/3-1/5)+(1/5-1/7)+......+(1/2011-1/2013)
=1-1/3+1/3-1/5+1/5-1/7+.....+1/2011-1/2013
=1-1/2013
=2012/2013