1⼀2+1⼀4+1⼀8一直加到1⼀256,它们的和是多少?

2024-11-30 01:36:07
推荐回答(1个)
回答1:

简便计算
1/2+1/4+1/8+....+1/256
=1-1/2+1/2-1/4+1/4-1/8+....+1/128-1/256
=1-1/256
=255/256