1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算
人气：451 ℃ 时间：2019-10-11 02:07:41
解答
1-2/3-2/9-2/27-2/81-2/243-2/729=1-2/3-2/9-2/27-2/81-2/243-2/729-1/729+1/729=1-2/3-2/9-2/27-2/81-2/243-3/729+1/729=1-2/3-2/9-2/27-2/81-2/243-1/243+1/729=1-2/3-2/9-2/27-2/81-1/81+1/729=1-2/3-2/9-2/27-1/...
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