计算 |1⼀3-1⼀2|+|1⼀4-1⼀3|+|1⼀5-1⼀4|+………+|1⼀2010-1⼀2009|

2024-12-12 02:04:34
推荐回答(2个)
回答1:

=1/2-1/3+1/3-1/4+1/4-1/5+……+1/2009-1/2010
=1/2-1/2010
=502/1005

回答2:

当中的全部约掉,只剩下 1/2 -1/2010