题目10.填空题-|||-当 x=2 ,y=2 时,4阶行列式-|||-l y-1-|||-l D= |} 1& -1& 1 1& -1& y+1 1& x-1& 1 x+1& -1& 1 | . = __ .-|||--1-|||--1-|||--1-|||-第1空:题目解答答案
