发布网友
共3个回答
热心网友
因为1-1/2=1/2,
1-1/2-1/4=1/4,
.......
所以1-1/2-1/4-...-256/1=1/256。
热心网友
1-1/2-1/4-1/8……-1/256=1/256
热心网友
小学解法:
1-1/2-1/4-1/8-1/16-1/32-1/-1/128-1/256
=1-(1/2+1/4+1/8+1/16+1/32+1/+1/128+1/256)
=1-(1/2+1/4+1/8+1/16+1/32+1/+1/128+1/256+1/256)+1/256
=1-(1/2+1/4+1/8+1/16+1/32+1/+1/128+1/128)+1/256
=1-(1/2+1/4+1/8+1/16+1/32+1/+1/)+1/256
.......
=1-(1/2+1/2)+1/256
=1/256