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11/12+23/24+47/48+95/96+191/192+383/384
人气:336 ℃ 时间:2019-10-17 00:45:33
解答
原式=1-(1/12)+1-(1/24)+1-(1/48)+1-(1/96)+1-(1/192)+1-(1/384)
=6-(1/12)-(1/24)-(1/48)-(1/96)-(1/192)-(1/384)
=6-63/384(等比数列求和公式)
=2241/384
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