1/2+3/4+7/8+15/16+31/32+63/64=127/128=?
问题描述:
1/2+3/4+7/8+15/16+31/32+63/64=127/128=?
答
等于(1-1/2)+(1-1/4)+(1-1/8)+(1-1/16)+(1-1/32)+(1-1/64)+(1-1/128)
=7-(1/2+1/4+1/8+1/16+1/32+1/64+1/128)
=7-127/128
=6又1/128