1-1/2-1/4-1/8-1/16-1/32-.-1/8192=
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1-1/2-1/4-1/8-1/16-1/32-.-1/8192=1-1/2-1/4-1/8-1/16-1/32-.-1/8192=1-1/2-1/4-1/8-1/16-1/32-.-1/8192=设
1-1/2-1/4-1/8-1/16-1/32-.-1/8192=
1-1/2-1/4-1/8-1/16-1/32-.-1/8192=
1-1/2-1/4-1/8-1/16-1/32-.-1/8192=
设s=1-1/2-1/4-1/8.-1/8192,则
2s=2-1-1/2-.-1/4096,则
2s-s=1/8192,即s=1/8192