1⼀2=1-1⼀2,1⼀6=1⼀2-1⼀3,1⼀12=1⼀3-1⼀4,...... 以此类推,则1⼀n(n+1)=?

2024-12-04 15:42:27
推荐回答(2个)
回答1:

1/n(n+1)=1/n-1/(n+1)

回答2:

1/n(n + 1) = 1/n - 1/(n + 1)