观察下列等式:1×(1⼀2)=1-(1⼀2),2×(2⼀3)=2-(2⼀3),3×(3⼀4)=3-(3⼀4),.....

2025-01-06 02:07:43
推荐回答(2个)
回答1:

n×(n/n+1)=n-(n/n+1)

(1-1/2)/10×(2-2/3)/9×(3-3/4)/8×...×(10-10/11)/1
=(1×1/2)/10×(2×2/3)/9×(3×3/4)/8×...×(10×10/11)/1
=1/2×2/3×3/4×...×10/11
=1/11

回答2:

1