一道平方差数学题
问题描述：
一道平方差数学题
(1/2+1)(1/2^2+1)(1/2^4+1)(1/2^8+1)(1/2^16+1)+1/2^31
答
(1/2+1)(1/2^2+1)(1/2^4+1)(1/2^8+1)(1/2^16+1)+1/2^31
=2*(1-1/2)(1/2+1)(1/2^2+1)(1/2^4+1)(1/2^8+1)(1/2^16+1)+1/2^31
=2*(1-1/2^32)+1/2^31
=2-1/2^31+1/2^31
=2神马意思