If A 1 6 6 7 then A1 You have attempted this problem 0 ti

If A = [-1 -6 -6 7], then A^-1 = | You have attempted this problem 0 times. You have unlimited attempts remaining.

Solution

Sol:

Find Determinant of A

if detA 0 then matrix A is non singular matrix then inverse exists.

detA=ad-bc=(-1)7-(-6)(-6)=-7-36=-43

0

Inverse exists for A.

A^{-1 =}1/ad-bc d -b

-c a

=1/-43 7 6

6 -1

= -7/43 -6/43

-6/43 1/43