Posted by haifeng on 2024-01-24 17:44:10 last update 2024-01-24 20:07:26 | Answers (3) | 收藏
若 $abc=1$, 求 $\dfrac{a}{ab+a+1}+\dfrac{b}{bc+b+1}+\dfrac{c}{ca+c+1}$ 的值.
注: 这道题硬算也是可以的.
