已知A-1=
(111
121
113)
,则A=____.
(5/2 -1 -(1/2) -1 1 0 -(1/2) 0 1/2) 分析:A= (1 1 1 1 2 1 1 1 3)-1 = (5/2 -1 -1/2 -1 1 0 -(1/2) 0 1/2)
已知A-1=
(111
121
113)
,则A=____.
(5/2 -1 -(1/2) -1 1 0 -(1/2) 0 1/2) 分析:A= (1 1 1 1 2 1 1 1 3)-1 = (5/2 -1 -1/2 -1 1 0 -(1/2) 0 1/2)