*2. 下列命题错误的是( )<br>·<img src="https://zk.995w.com/lqwvjeImg/d4/d47862ac4ba8fe36eb2ba58cbc425b7a.png">维列向量组<img src="https://zk.995w.com/lqwvjeImg/f3/f3da4cec02fc2de9445c7b9702c17e42.png">可以线性无关<br>·矩阵的初等变换可能改变矩阵的秩<br>·<img src="https://zk.995w.com/lqwvjeImg/d4/d47862ac4ba8fe36eb2ba58cbc425b7a.png">维列向量组<img src="https://zk.995w.com/lqwvjeImg/f3/f3da4cec02fc2de9445c7b9702c17e42.png">必线性相关<br>·若方阵<img src="https://zk.995w.com/lqwvjeImg/c2/c250ac911c7276b7ee6cbec81d469ee0.png">,则<img src="https://zk.995w.com/lqwvjeImg/92/92a017ca4e8a5200c56a1a902ba374e3.png">可逆。