1,1/3,1/9,1/27,1/18,( )

来源：学生作业帮编辑：作业帮分类：物理作业时间：2024/05/15 23:58:12

1,1/3,1/9,1/27,1/18,( )
A.1/243 B.1/255 C.1/162 D.1/164

题目修改一下1,1/3,1/9,1/27,1/81 A 1=（1/3）^0,1/3=(1/3)^1 1/9=(1/3)^2 …… 1,1/3,1/9,1/27,1/81,(1/243 )

1+9+18+27=? 1/3+1/9+/1/27+...+1/3^7=? 1/3,-1/9,1/27,-1/81...求数列 12,9,21,27,15,60,3,1,18 1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187 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：3/1+9/1+27/1+81/1+243/1+729/1+2187/1 计算：1-1/3-1/9-1/27-1/81-1/243-1/729 1/3-1/9+1/27+...+(-1)^n-1*1/3^n的极限 3/1+9/1+27/1+81/1+243/1+729/1怎么算?