题目3/9 1-|||-设矩阵A的伴随矩阵A^×= 16 且 |A|gt 0 ,^-1=(BA)^-1+3I ,-|||-1-|||-其中I为单位矩阵,则 B= __-|||-^-1=(BA)^-1+3I 两边左乘 ^-1 右乘A得 =(A)^-1B+3I ,题目解答答案