[(1+29)*(1+29/2)*...*(1+29/30)*(1+29/31)]/[(1+31)*(1+31/2)*(1+31/3)*...*(1+31/28)*(1+31/29)=?

问题描述:

[(1+29)*(1+29/2)*...*(1+29/30)*(1+29/31)]/[(1+31)*(1+31/2)*(1+31/3)*...*(1+31/28)*(1+31/29)=?
[(1+29)*(1+29/2)*...*(1+29/30)*(1+29/31)]/[(1+31)*(1+31/2)*(1+31/3)*...*(1+31/28)*(1+31/29)〕=?
上面那道题少了一个中括号

给你个思路
原式=[(1/1+29)*(2/2+29/2)*...*(30/30+29/30)*(31/31+29/31)]/[(1/1+31)*(2/2+31/2)*(3/3+31/3)*...*(28/28+31/28)*(29/29+31/29)