16．已知A= <img src="https://zk.tikuw.cn/lqwvjeImg3/2/2/84/2284a6fffba9536b96b9d4c8035cd082.jpg" title="1" alt="1" suffix="jpg" style="max-width: 100%;"/> ，B= <img src="https://zk.tikuw.cn/lqwvjeImg3/9/7/e0/97e04ea172836ed0d28a09a0e4cc5a1f.jpg" title="2" alt="2" suffix="jpg" style="max-width: 100%;"/> .(1）求A<sup>-1</sup>；(2）解矩阵方程AX = B.