1⼀2+1⼀6+1⼀12+1⼀20......1⼀110怎样计算?

2025-01-13 07:17:06
推荐回答(4个)
回答1:

1/2+1/6+1/12+1/20......1/110
=1/2+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+......+(1/10-1/11)
=1/2+1/2-1/11
=1-1/11
=10/11

回答2:

1/2+1/6+1/12+1/20......1/110
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+...+1/10-1/11
=1-1/11
=10/11

回答3:

1/2+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+......+(1/10-1/11)
=1/2+1/2-1/11
=1-1/11
=10/11

回答4:

2=1*2

6=2*3

20=4*5

=1-1/2+1/2-1/3+1/3-1/4......+1/10-1/11
=1-1/11
=10/11