We____her with a detached house but she specially asked for a small flatA.must have provided B.could have providedC.might provide D.ought to provide答案应该是B,为什么?请说明原因,

We____her with a detached house but she specially asked for a small flatA.must have provided B.could have providedC.might provide D.ought to provide答案应该是B,为什么?请说明原因, Det 1.A、B均为n阶方阵,则必有A.det(A)det(B)=det(B)det(A) B.det(A+B)=det(A)+det(B) C.(A+B)的转置=A+B 设A为5阶矩阵,且det A=3,求det（AA^T）和det（A^*） detA+detB=det(A+B)吗 det(A)在线性代数里是什么意思?急! A为四阶矩阵det（A）＝3求det（-2A） A B C D为矩阵其中A C为对角矩阵行列式det([A B;C D]）的值是否与行列式det(A)*det(D)-det(B)*det(C)相等 三阶矩阵A满足det(A-I)=det(A-I)=det(3A+2I)=0求det(2A+I)det(A-I)=det(A+2I)=det(3A+2I)=0 A为3阶矩阵,det（A+E）=0,det（A+3E）=0,det（A-2E）=0,求detA 设A为m阶方阵,B为n阶方阵,C=……则设A为m阶方阵,B为n阶方阵,C= 0 A 则det（C）=B 0A.det(A)det(B) B.-det(A)det(B) C.(-1)^(m+n)*det(A)det(B) D.(-1)^(mn)*det(A)det(B)C= 0 AB 0 A是一个n乘以n的矩阵,求det(kA)=k^(n-1)det(A)的证明应该是k^(n)det(A) 设A为四阶矩阵,且 detA=3.则det(-A)= .det(-2A)= ,-2detA .det(-2AT) A是n阶矩阵,a是向量,求证det(aA)=a^n×det(A)A是n阶矩阵，a是标量，求证det(aA)=a^n×det(A) 如果A为n阶正交矩阵,且det(A)=-1,则det(A'-A*)= 设A,B都是n阶实矩阵,其中A正定,B半正定.证明：det(A+B)>det(A) det A 和 det A*的关系?其中A*是A的伴随矩阵……给出英文详细证明~ 如果A是可逆矩阵,证明det(A^-1)=1/det(A). 求证明过程!谢谢!