|1⼀3-1⼀2|+|1⼀4-1⼀3|+|1⼀6-1⼀5|+...+|1⼀10-1⼀9|的值

2024-12-13 04:20:58
推荐回答(3个)
回答1:

你是不是少输了一项,原题是不是:
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+...+|1/10-1/9|
=1/2-1/3+1/3-1/4+1/4-1/5...+1/9-1/10
=1/2-1/10
=2/5

欢迎向数学爱好者团队提问,不会还可以再问我,希望采纳,O(∩_∩)O谢谢!

回答2:

直接展开
1/2-1/3+1/3-1/4+1/4.......+1/9-1/10
=1/2-1/10
=2/5

回答3:

因为 1/2 > 1/3 > 1/4 > 1/5 > 1/6 > 1/7 > 1/8 > 1/9 > 1/10
所以原式=-(1/3-1/2)-(1/4-1/3)-(1/6-1/5)-...-(1/10-1/9)
=1/2-1/3+1/3-1/4+1/4.......+1/9-1/10
=1/2-1/10
=2/5