1/2+3/4+7/8+...+63/64
问题描述:
1/2+3/4+7/8+...+63/64
答
1/2+3/4+7/8+15/16+31/32+63/64
= 1-1/2+1-1/4+1-1/8+1-1/16+1-1/32+1-1/64
= 6-(1/2+1/4+...+1/64)
= 6-63/64
=5又1/64