Posted by haifeng on 2025-01-18 10:34:34 last update 2025-01-18 10:34:34 | Answers (1) | 收藏
设 $x_n=\sum\limits_{k=1}^{n}\frac{1}{\sqrt{k}}-2\sqrt{n}$, 证明 $\lim\limits_{n\rightarrow\infty}x_n$ 存在.
