1,1/3,1/3,1/9,1/27,() A.1/243 B.1/255 C.1/162 D.1/164
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1,1/3,1/3,1/9,1/27,()A.1/243B.1/255C.1/162D.1/1641,1/3,1/3,1/9,1/27,()A.1/243B.1/255C.1/162D.1/1641,
1,1/3,1/3,1/9,1/27,() A.1/243 B.1/255 C.1/162 D.1/164
1,1/3,1/3,1/9,1/27,()
A.1/243 B.1/255
C.1/162 D.1/164
1,1/3,1/3,1/9,1/27,() A.1/243 B.1/255 C.1/162 D.1/164
A
答案就是前两个数乘起来
A
每个数字都是等于它前边两个数字的积
1,3,3,9,27,
1/3,-1/9,1/27,-1/81...求数列
1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187
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=?
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
1/3-1/9+1/27+...+(-1)^n-1*1/3^n的极限
1,1-3,1-3+9,1-3+9-27的通项公式,
计算 (1/3)^-2×9^3×27^-1/2
计算 (1/3)^-2×9^3×27^-1/2
1/3+1/9+1/27+1/81+1/243+1/729求简便~~~~~~~~~~~~~~~
1/3+1/9+1/27+1/81+1/243+1/729怎简便
3/1+9/1+27/1+81/1+243/1+729/1怎么算?
42+1/3+1/9+1/27+1/81+1/243+1/729
1/2,1/3,1/4,1/8,1/9,1/27,( ),( )有什么规侓?
(1-1/3 +1/9-1/27 .(-1/3)^2)的数列公式
简便计算243+81+27+9+2+1+1/3+1/9+1/27+1/81+1/243