1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/23 16:02:09

1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187
=1-(1/3+1/9+1/27+1/81+1/243+1/729+1/2187)
=1-(1/3)*[1-(1/3)^7]/[1-(1/3)]
=1-(1/3)*[1-(1/2187)]/(2/3)
=1-(1/2)*(2186/2187)
=1094/2187

1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187 巧算：1+3+9++27+81+243+729+2187 计算：3/1+9/1+27/1+81/1+243/1+729/1+2187/1 1+3+9+27+81+243+729 用错位相减法算（1）3+9+27+81+243+729+2187的和计算：1+3+9+27+81+243+729+2187+6561+19683! 找规律2187,729,243,81,（）,（）,3,1 求1+1/3+1/9+1/27+1/81+...+1/243+1/729 计算：1+1/3+1/9+1/27+1/81+1/243+1/729 1-1/3-1/9-1/27-1/81-1/243-1/729=? 计算：1-1/3-1/9-1/27-1/81-1/243-1/729 3/1+9/1+27/1+81/1+243/1+729/1怎么算?