题目内容

已知矩阵A二阶方阵,且|A|=-2, 则|3A|=

A. 6
B. -6
C. -18
D. 18

查看答案
更多问题

会计师

A. assistant
B. artist
C. actor
D. accountant

助手,店员

A. accountant
B. artist
C. assistant
D. actor

名流,名人

A. celebrity
B. engineer
C. DJ
D. journalist

经济

A. information
B. economy
C. introduce
D. media

答案查题题库