Posted by haifeng on 2023-07-31 08:52:56 last update 2023-07-31 08:52:56 | Answers (1) | 收藏
(1)
\[ \begin{vmatrix} a & b & c & d\\ a & a+b & a+b+c & a+b+c+d\\ a & 2a+b & 3a+2b+c & 4a+3b+2c+d\\ a & 3a+b & 6a+3b+c & 10a+6b+3c+d \end{vmatrix}=a^4 \]
