If then compute the inverse of A and verify that A–1 A = I = A A–1
Co-factors of the elements of the first row of | A | are
i.e., 2, – 3, 5 respectively. Co-factors of the elements of the second row of | A | are i.e., 3, 6, – 3 respectively. Co-factors of the elements of the third row of | A | are i.e., – 13, 9, – 1 respectively.
Long Answer Type
Short Answer Type
then compute the inverse of A and verify that A–1 A = I = A A–1
if 
Also show that 
then verify that 
.
Switch
