1⼀1×2+1⼀2×3+1⼀3×4+......+1⼀99×100=?

2025-06-29 05:40:09
推荐回答(1个)
回答1:

1/1×2+1/2×3+1/3×4+......+1/99×100
=1-1/2+1/2-1/3+1/3-1/4+……+1/99-1/100
=1-1/100
=99/100