计算:(1-1/2^2)(1-1/3^2)(1-1/4^2)…(1-1/2014^2)(1-1/2015^2)
计算:(1-1/2^2)(1-1/3^2)(1-1/4^2)…(1-1/2014^2)(1-1/2015^2)
日期:2020-12-31 22:58:32 人气:1
(1-1/2^2)(1-1/3^2)(1-1/4^2)…(1-1/2014^2)(1-1/2015^2)
=(1/2)*(3/2)*(2/3)*(4/3)*(3/4)*(5/4)......(2013/2014)*(2015/2014)*(2014/2015)*(2016/2015)
=(1/2)*(2016/2015)
=1008/2015