计算行列式的值
|20062007|
|20082009|
|2006 2007| |2008 2009| = | 2006 2007 | |2008-2006 2009-2007| = |2006 2007| | 2 2 | = |2006 2007-2006| | 2 2-2 | = |2006 1| | 2 0| =-2
计算行列式的值
|20062007|
|20082009|
|2006 2007| |2008 2009| = | 2006 2007 | |2008-2006 2009-2007| = |2006 2007| | 2 2 | = |2006 2007-2006| | 2 2-2 | = |2006 1| | 2 0| =-2