(1+1⼀2)*(1+1⼀4)*(1+1⼀5)*(1+1⼀6)…*(1+1⼀10)*(1-1⼀3)*(1-1⼀5)*(1-1⼀6)*…(1-1⼀9)=?

2024-12-30 01:28:23
推荐回答(3个)
回答1:

原式=3/2*5/4*6/5*...*11/10*2/3*4/5*...*8/9
=10/9*11/10
=11/9

回答2:

(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+10/1)*(1-1/3)*(1-1/5)*(1-1/7)*(1-9/1)
=3/2*5/4*....*11/10*2/3*4/5.....*8/9
=3/2*2/3*5/4*4/5*.....*9/8*8/9*11/10
=1*1*...*1*11/10
=11/10

回答3:

11/9