设A为3阶矩阵,r(A)=2,若存在可逆矩阵P,使得,则r(B)=________.<
,则r(B)=________.<"> ,则r(B)=________.<">
设A为3阶矩阵,r(A)=2,若存在可逆矩阵P,使得,则r(B)=________.
2