INVERSE OF MATRIX

1. INVERSE OF MATRIX
BY
MUHAMMAD AHSAN KHAN
(38807)

2. INVERSE OF MATRIX
FORMULA:

3. Example
Find inverse of A
LET A= 2 4
4 9
 Determinant = ( ad – bc ) = (2)(9) – (4)(4) =10
 Adj A = d -b = 9 -4
-c a -4 2

4. Example
 Putting the value of determinant and adj A in the formula of A-1
A-1 =1/10 9 -4 = 9/10 -4/10
-4 2 -4/10 2/10
A-1 = 0.9 -0.4
-0.4 0.2