1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算

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1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算1-2/3-2/9-2/27-2/81-2/243-2/

1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算
1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算

1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算
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
=1-2/3-2/9-2/27-1/27+1/729
=1-2/3-2/9-1/9+1/729
=1-2/3-1/3+1/729
=1-1+1/729
=1/729

给采纳

1/729