(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)*(1+1/4)*(1-1/4)*(1+1/5)*(1-1

问题描述:

(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)*(1+1/4)*(1-1/4)*(1+1/5)*(1-1/5)=?
1个回答 分类:数学 2014-10-17

问题解答:

我来补答
(1+1/2)*(1-1/2)*(1+1/3)*(1-1/3)*(1+1/4)*(1-1/4)*(1+1/5)*(1-1/5)
=(3/2)*(1/2)*(4/3)*(2/3)*(5/4)*(3/4)*(6/5)*(4/5)
=(1/2)*(6/5)
=3/5
 
 
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