找规律计算 二分之一+四分之一+八分之一+十六分之一+三十二分之一+六十

2024-11-07 06:50:46
推荐回答(2个)
回答(1):

回答(2):

1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/128+(1/128-1/256)
=1/2+1/4+1/8+1/16+1/32+1/64+(1/128+1/128)-1/256
=1/2+1/4+1/8+1/16+1/32+1/64+1/64-1/256
=1/2+1/4+1/8+1/16+1/32+1/32-1/256
=……
=1-1/256
=255/256