Question

一乘二乘三分之一加二乘三乘四分之一一直加到四十八乘四十九乘五十等于几？

要过程

Answer 1

1/(1×2)+1/(2×3)+1/(3×4)+……1/(49×50)
=1/1-1/2+1/2-1/3+1/3-1/4+……+1/49-1/50
=1-1/50
=49/50中间抵消，求采纳

Answer 2

1/(1×2)+1/(2×3)+1/(3×4)+……1/(49×50)
=1/1-1/2+1/2-1/3+1/3-1/4+……+1/49-1/50
=1-1/50
=49/50
以上回答你满意么？

追问

那三个数的呢？一乘二乘三？