- A.0
- B.1
- C.2
- D.3
- A.<img src="//img1.yqda.net/question-name/99/fdb899c126a1fda56adebea9432b0d.png" width="77" height="77"/>
- B.<img src="//img1.yqda.net/question-name/65/f0aa6abda998209aca47ad20f0f71f.png" width="83" height="75"/>
- C.<img src="//img1.yqda.net/question-name/57/28c4b39029d297af6d510518197e0c.png" width="84" height="82"/>
- D.<img src="//img1.yqda.net/question-name/72/601325b84da8544b53134a11371cbb.png" width="85" height="75"/>
- 21
-
矩阵
有一个特征值为()
- A.-3
- B.-2
- C.1
- D.2
- 22
-
若
,且2A=B,则()
- A.x=1,y=2
- B.x=2,y=1
- C.x=1,y=1
- D.x=2,y=2
- A.a=0,b=1
- B.a=1,b=0
- C.a=0,b=0
- D.a=1,b=1