判断下列矩阵是否可逆，若可逆，求它的逆矩阵.[tex=4.571x2.786]dEdrC9SQsN/3Vx39SaFo4LxwNJrq217/wqKvN/bofNoswLDKqNUUcYE0xE3VhocNC+djNAmbuP+ecoaUDr/I0Q==[/tex]；
举一反三
- 判断下列矩阵是否可逆，若可逆，求它的逆矩阵.[tex=8.0x3.643]dEdrC9SQsN/3Vx39SaFo4KoFbxGQkHR8S1F1lBgJktZWcCZnptPs58LN52o9kApBj9HN2/EO87xZvXpKHXILwO0UvfCQMheFccMP6k5ONQKtlpY3ga/BL+KGf78hHFZn[/tex].
- 判断下列矩阵是否可逆，若可逆，求它的逆矩阵：[tex=4.929x2.786]jcCMHflCR8OS9TosV6N5vMkHTRHzWo810v8QRVT0g3iIrbBisQQHPhUbdUi+Iuw9MsuA8FTpmhnzNyhIPdVfEw==[/tex]
- 判断下列矩阵是否可逆，若可逆，求它的逆矩阵：[tex=5.0x2.786]jcCMHflCR8OS9TosV6N5vLL6n+SGrZCwS6nSbQyHJg6OKppmI9hk5wtrzr/b+Qxo9b3EmH/gAD0Z0gLYG/irgA==[/tex].
- 求下列矩阵的伴随矩阵，若可逆，求逆矩阵：[p=align:center][tex=4.571x2.786]075gCzZzsMRb6HYXYk9X99kndfbJ3U3QeBg7vJXXA4luJy1yxxuTOQvqIyyBqshLDWuFqgbusozdZjBR/QQkNQ==[/tex]
- 判断矩阵[tex=7.786x3.5]3BT1BgBZQ5uJXxD5dg+w2/ZzvAjU/pVa/PBSz4mFwQuCH+D0tIH3BTmqh8hueWGqdIsEtzPLyA8BMoqPlwDBz2ingshT3e/yPFscdEJmwqlk6GkOaExjhbw7xiPg6Sdi[/tex]是否可逆,若可逆,用求逆公式求逆矩阵.