已知矩阵
有零特征值,又矩阵
使方程组AX=B有解.
求X.
参考答案:因为方程组Ax=β1,Ax=β2,Ax=β3的通解依次为
故矩阵方程的解为
近视眼配戴用____________透镜制作的近视眼镜就可以起到矫正作用。(选填“凸”或“凹”)
()He teaches physics in a school.
A.What does your father want to do?
B.Who is your father?
C.What is your father?
D.Where is your father now?