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1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256怎么算?
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256怎么算哦
用裂项的方法算
人气:417 ℃ 时间:2020-03-29 22:16:33
解答
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+1/256+1/256-1/256=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-...
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