计算：1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496 要有过程.
问题描述：
计算：1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496 要有过程.
答
=1/2+1/4+1/8+1/31*(1+1/2+1/4+1/8+1/16)
=7/8+1/31*(1+15/16)
=7/8+1/16
=15/16