4． $\lim _{x \rightarrow \infty}\left(1+\frac{1}{3}+\frac{1}{3^{2}}+\cdots+\frac{1}{3^{n}}\right)=$
参考答案B
2010 高考数学第 4 题答案解析
2010_退役省自主命题 (2010·理)
2010_退役省自主命题 (2010·理)
4． $\lim _{x \rightarrow \infty}\left(1+\frac{1}{3}+\frac{1}{3^{2}}+\cdots+\frac{1}{3^{n}}\right)=$