• 2022-06-18
    用行列式性质, 化行列式[tex=6.714x4.5]TIwZYBkNsy31H1RNd/OloF8hzn/iQKxIUT1oKdsg0R3jLMXX3laYDx5AIFbERHnlWP+J07lODRqizmwIB0/gYqCD0FRyLODVrGPOBsPtMjetcxaRKeXKdRAJG40iaKxcQgmWsKrsLjzmuuh5iUzPxw==[/tex]为上三角形行列式, 并求其值.