1/3+1/9+1/27=?1/3+1/9+1/27+1/81=?1/3+1/9+1/27+1/81+1/243=?1/3+1/9+1/27+1/81+1/243+1/729=?蟹蟹=w=
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1/3+1/9+1/27=?1/3+1/9+1/27+1/81=?1/3+1/9+1/27+1/81+1/243=?1/3+1/9+1/27+1/81+1/243+1/729=?蟹蟹=w=1/3+1/
1/3+1/9+1/27=?1/3+1/9+1/27+1/81=?1/3+1/9+1/27+1/81+1/243=?1/3+1/9+1/27+1/81+1/243+1/729=?蟹蟹=w=
1/3+1/9+1/27=?
1/3+1/9+1/27+1/81=?
1/3+1/9+1/27+1/81+1/243=?
1/3+1/9+1/27+1/81+1/243+1/729=?
蟹蟹=w=
1/3+1/9+1/27=?1/3+1/9+1/27+1/81=?1/3+1/9+1/27+1/81+1/243=?1/3+1/9+1/27+1/81+1/243+1/729=?蟹蟹=w=
一、13/27
二、40/81
三、121/243
四、364/729
1,3,3,9,27,
1-1/3-1/9-1/27-1/81-1/243-1/729=?
解方程:X*1/3*4/9=1/27
1/3,-1/9,1/27,-1/81...求数列
1/3+1/9+1/27+1/81+1/243=?(要简便计算)
1-1/3+1/9-1/27+1/81-1/243+1/729-1/2187+...=? 拜托各位
1/3+1/9+/1/27+...+1/3^7=?求结果
1/3+1/9+1/27=?1/3+1/9+1/27+1/81=?1/3+1/9+1/27+1/81+1/243=?1/3+1/9+1/27+1/81+1/243+1/729=?蟹蟹=w=
lim(2^1/3)*(4^1/9)*(8^1/27)*...*[(2^n)^(1/3^n)]=lim(2^1/3)*(4^1/9)*(8^1/27)*...*[(2^n)
1-1/3-1/9-1/27-1/81-1/243-1/729-1/2187
(x+1)^3=-27
计算: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