- 10
-
计算行列式D=
.
- 14
-
设向量
,则
= .
- A.0
- B.1
- C.2
- D.3
- A.1
- B.2
- C.3
- D.4
- A.r=m时,Ax=0必有非零解
- B.r=n时,Ax=0必有非零解
- C.r<m时,Ax=0必有非零解
- D.r<n时,Ax=0必有非零解
- A.<img src="//img1.yqda.net/question-name/08/59ff0b1e435763593a593527ae369c.png" width="66" height="66"/>
- B.<img src="//img1.yqda.net/question-name/12/36affea810aa5b69ca097a31d1b8b2.png" width="66" height="66"/>
- C.<img src="//img1.yqda.net/question-name/31/d4b88042bc077bf23a09956a920f81.png" width="66" height="66"/>
- D.<img src="//img1.yqda.net/question-name/7f/a7ac152b0dae405de3d850b2322ca1.png" width="66" height="66"/>
- 23
-
设行列式
,
,则
( )
- A.-3
- B.-1
- C.1
- D.3