Answer:
A = 0 -7 b= 0 -7
3 2d 3 2d
Let's calculate A and B:
- A= 0*2d- 3*(-7) = -3*(-7) = 21
- B= 0.2d- 3*(-7) = -3*(-7) = 21
Calculte (AB)^(-1):
- (AB)^(-1) = (21*21)^(-1) = (21²)^(-1) = 21^(-2)
Calculte B^(-1) and A^(-1):
- B^(-1) * A^(-1) = 21^(-1) * 21^(-1)= 21^(-1-1) = 21^(-2)
so:
(AB)^(-1) = B^(-1) * A^(-1)
