计算:1/2+1/4+1/8+1/16+1/64+1/128+1/256

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计算:1/2+1/4+1/8+1/16+1/64+1/128+1/256
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计算:1/2+1/4+1/8+1/16+1/64+1/128+1/256
计算:1/2+1/4+1/8+1/16+1/64+1/128+1/256

计算:1/2+1/4+1/8+1/16+1/64+1/128+1/256
1/2+1/4=3/4
1/2+1/4+1/8=7/8
1/2+1/4+1/8+1/16=15/16
……………………………………
1/2+1/4+1/8+1/16+1/64+1/128+1/256 =255/256