计算:1⼀1*2+1⼀2*3+1⼀3*4+……+1⼀2012*2013怎么做?

2025-04-04 10:00:05
推荐回答(5个)
回答1:

1/1*2+1/2*3+1/3*4+……+1/2012*20131/1*2=1-1/21/2*3=1/2-1/31/3*4=1/3-1/4同理1/2012*2013=1/2012-1/20131/1*2+1/2*3+1/3*4+……+1/2012*2013=1-1/2+1/2-1/3+1/3-1/4+……+1/2011-1/2012+1/2012-1/2013=1-1/2013=2012/2013

回答2:

用数列做

回答3:

回答4:

回答5: