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試卷名稱：110年 - 110 台灣聯合大學_碩士班招生_電機類：工程數學C#124898
年份：110年
科目：研究所、轉學考(插大)◆工程數學
2. Continue from Question -. Which of the following statements is/are true?
(A) The nonzero rows of R form a basis for col
.
(B) Let C be the reduced row echelon form of 
. Then 
is the identity matrix.
(C) Let E be a 3 x 5 matrix and
[10110]
D = 01110
100001
be the reduced row echelon of E. We can obtain the intersection of the right null
space of A and the right null space of E from R and D without knowing A and E.
(D) Let Q be a 5 x 5 matrix and rank(Q) = 3. Then rank(AQ) = 3.
(E) None of the above is true.
