問題詳情

4.Let

, R( A ) denote the column space of A, and N( A ) denote the null space of A. Which ofthe following statements are true?
(A) There exists a nonzero vector

such that ATy = 0 and y = Ax for some


(B) For every

, we can always find some

such that y = Ax.
(C) Let p be the orthogonal projection of


(D) Let y be a vector in Rm. If

.
(E) The intersection of R( A ) and N(AT) is the empty set.

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增