若齐次线性方程组<img src=https://huaweicloudobs.ahjxjy.cn/103D8D0F4CAFD88F52C1193CD6A0FB32.png title=QQ图片20160107170503.png alt=QQ图片20160107170503.png/>仅有零解,则k必须满足( )。
①
<img src=https://huaweicloudobs.ahjxjy.cn/42898F1948811178BE74688AC064F148.png title=QQ图片20160107170601.png alt=QQ图片20160107170601.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/5BA6B76DB33D9FE76D8CC3162F6984F4.png title=QQ图片20160107170613.png alt=QQ图片20160107170613.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/4EBC84E7CF7FC397603943F19D58351D.png title=QQ图片20160107170641.png alt=QQ图片20160107170641.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/397506B971DE89865CFC487E220C784F.png title=QQ图片20160107170654.png alt=QQ图片20160107170654.png/>