对线性方程组的增广矩阵做初等行变换可得 则当（　）时，该方程组无解．

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image311.png" alt="" align="middle">且<img src="http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image312.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image311.png" alt="" align="middle">且<img src="http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image313.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image314.png" alt="" align="middle">且<img src="http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image312.png" alt="" align="middle">

<img src、"http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image314.png" alt="" align="middle">且<img src="http://oss.ouchn.cn/ddzx/N601/gongxue/jjsx/img/1/image313.png" alt="" align="middle">