Q48 of 98 Page 314

If A=then A-1=?

= 3 x (0 - 2) – 4 x (2-4)+1 x (-1)


= -6+8-1


= 1


C11 = -2 C12 = 2 C13= -1


C21= -9 C22 = 8 C23= -5


C31= -8 C32=7 C33 =-4


Cofactor (A)= [ ]


Adj A = [ ]’


=[ ]


A-1= adj A


= [ ]


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