→ gcobc12632:對 02/06 01:17
推 godhand0629:基本矩陣指的是由單位矩陣進行 "一次" 基本 "列" 運算 02/06 11:44
→ godhand0629:要讓"行"重新排列 自己想想看絕對超過一次的"列"運算 02/06 11:45
推 WAYS22275:第一次覺得樓上名符帳號 02/06 17:24
→ godhand0629:ASK板還真有人問這題ㄟ = = 02/14 17:02
覺得PO到ASK版有點智障 所以先問一下你們
3. There are many types of elementary matrices. Which of the following
definitions are elementary matrices? (I:identity matrix)
A. An nxn matrix is obtained by interchanging two rows of I.
B. An nxn matrix is obtained by multiplying a row of I by a nonzero constant.
C. An nxn matrix is obtained from I by adding a multiple of one row to another
row.
D. An nxn matrix is formed from I by reordering its columns.
E. 以上皆TRUE
這題問的是定義
因為我以為D重新排列行也是 elementary matrices
是因為重新排列不一定只換兩行 所以不能選?
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