名校
1 . 命题:①
;
②矩阵
、
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5720485f3077f50bdea60ce4e2dde7e.png)
③若
、
不共线,且
,
,则
;
④若三元一次方程组有
,则该方程组有无穷多组解;
上述命题中正确的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177f821366827c5b94a7fd8065eadf76.png)
②矩阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98573a9a667b0eebb101d0811a4e761a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1611029414e220228e49fecefb40af47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5720485f3077f50bdea60ce4e2dde7e.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772a19196fc427d3aac1164c927fe2e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb0940732e5f30a76d39358add2709b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9e0ce64ae045a2ca99a8a25dada3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c49e85355623dd104fae1231b6a408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf622559035c0764b67644604514c17.png)
④若三元一次方程组有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90804c52cb76ba60389cddabd4dd8350.png)
上述命题中正确的个数有( )
A.0个 | B.1个 | C.2个 | D.3个 |
您最近一年使用:0次
A.0个 | B.1个 | C.2个 | D.3个 |