5/6+5/18+5/36+1/12+1/18+5/126+5/168+5/216+1/54=?(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/5+1/10+1/15+1/20)=?1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+1/(7*9*11)+1/(9*11*13)=?有过程的必有重赏

问题描述:

5/6+5/18+5/36+1/12+1/18+5/126+5/168+5/216+1/54=?
(1/2+1/4+1/6+1/8)-(1/3+1/6+1/9+1/12)+(1/4+1/8+1/12+1/16)-(1/5+1/10+1/15+1/20)=?
1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+1/(7*9*11)+1/(9*11*13)=?
有过程的必有重赏