Question

线性代数,回答了再追分哈,A为三阶方阵,而且|A|=-9,则|A'A|= |A|A*||= |(A*)*|= |4A的逆

Answer 1

|A|A*||=B||

|(A*)*|=||(A*)||

|4A的逆-A*|=A||(A*)|