【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/6C09691F4A38CAA4AC0A3B5E895ED0A0.png title=1.png alt=1.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/D41198B87CD879CD9DA01B900303E4A5.png title=1-1.png alt=1-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/48D8700AA8EE91C9D151A718FE9B89B4.png title=1-2.png alt=1-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/5FDDF9F3A3E992AA1D82908A550CF21E.png title=1-3.png alt=1-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/AE636347E44696A2405EE63662654F74.png title=1-4.png alt=1-4.png/>
【单选题】
矩阵<img class=jc-formula data-tex=\left[ 1\quad 1\quad 0\\ 1\quad 2\quad 0\\ 0\quad 0\quad 3 \right] src=https://huaweicloudobs.ahjxjy.cn/07D980FCD104718A67942ED06FC0EB9B.png style=vertical-align: middle;/>的逆矩阵是
①
<img class=jc-formula data-tex=\left[ 2\quad 1\quad 0\\ 1\quad 1\quad 0\\ 0\quad 0\quad 3 \right] src=https://huaweicloudobs.ahjxjy.cn/4AF478695AFBD2B76864DA15A78B7CD3.png style=vertical-align: middle;/>
②
<img class=jc-formula data-tex=\left[ 1\quad 1\quad \quad 0\\ 1\quad 2\quad \quad 0\\ 0\quad 0\quad \frac { 1 }{ 3 } \right] src=https://huaweicloudobs.ahjxjy.cn/38C7476129FC9885369E780AC9CBF9DB.png style=vertical-align: middle;/>
③
<img class=jc-formula data-tex=\left[ \frac { 1 }{ 2 } \quad 1\quad \quad 0\\ \quad 1\quad \quad 1\quad \quad 0\\ \quad 0\quad \quad 0\quad \frac { 1 }{ 3 } \right] src=https://huaweicloudobs.ahjxjy.cn/3F9B9A7633837CA8C4A9BA58C8B01DF2.png style=vertical-align: middle;/>
④
<img class=jc-formula data-tex=\left[ \quad 2\quad -1\quad \quad 0\\ -1\quad \quad 1\quad \quad 0\\ \quad 0\quad \quad 0\quad \frac { 1 }{ 3 } \right] src=https://huaweicloudobs.ahjxjy.cn/58A5A84772C94794E27FA1DEEBE2F4C3.png style=vertical-align: middle;/>