1.Suppose Q is a 4x3 matrix with orthonormal col. q1,q2,q3
(b) Describe the nullspace of (the same 4 by 3 matrix) and the nullspace of
(you can still answer this one even if you didn’t answer part (a)).
Describe also the nullspaces of Q^tQ and QQ^t
nullspace我知道 但其他三个?
2.
相异等价类为[0] [1] [2]
解答看不太懂 请问这是怎么算出来的?
3.
e选项
我的答案是{0,4} 不知对不对
以上