1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算
问题描述:
1-2/3-2/9-2/27-2/81-2/243-2/729=?求简算
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/...