1-1/2-1/4-1/8-……-1/128=?用简便方法计算
问题描述:
1-1/2-1/4-1/8-……-1/128=?用简便方法计算
答
1-1/2-1/4-1/8-1/16……-1/128-1/128+1/128
=1-1+1/128
=1/128