1/2+1/4+1/8+1/16+1/32+1/64+1/128算出计算过程,

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1/2+1/4+1/8+1/16+1/32+1/64+1/128算出计算过程,
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1/2+1/4+1/8+1/16+1/32+1/64+1/128算出计算过程,
1/2+1/4+1/8+1/16+1/32+1/64+1/128算出计算过程,

1/2+1/4+1/8+1/16+1/32+1/64+1/128算出计算过程,
原式=(1/2+1/4)+1/8+1/16+1/32+1/64+1/128
=(3/4+1/8)+1/16+1/32+1/64+1/128
=(7/8+1/16)+1/32+1/64+1/128
=...
=127/128
.