西安毛子科技大学二XIDIAN UNIVERSITYEn0P0Enarn而消法变换不改变行列式的值,( )(Pr...Pin./-EPA=[A|B|,-EB, 0 n n E A E = 11 1 1 1 1 1 1 n n nn a a a a = 11 1 1 0 0 n n n nn n E P P P P E 而消法变换不改变行列式的值, ( ) 11 1 1 ( ) 0 0 0 n n n nn n E A A A P P P P E E B E B = − − A 0 E B = − = A B