设A= 0 3 3
问题描述:
设A= 0 3 3
( 1 1 0 ) ,AB=A+2B ,求B.
-1 2 3
答
AB-2B=A.→(A-2I3)B=A.→-2 3 3 0 3 3 用高斯消元法求解即可.
(1 -1 0)B= (1 1 0)
-1 2 1 -1 2 3 .