= 3 x (0 - 2) – 4 x (2-4)+1 x (-1) = -6+8-1 = 1 C 11 = -2 C 12 = 2 C 13 = -1 C 21 = -9 C 22 = 8 C 23 = -5 C 31 = -8 C 32 =7 C 33 =-4 Cofactor (A)= [ ] Adj A = [ ]’ =[ ] A -1 = adj A = [ ]

If A= then A -1 =?

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

= [ ]

If A=then A-1=?

If A=then A^-1=?