To find adj A we will first find the cofactor matrixC11 = 3 C12 = -1C21= -5 C22 = 2Cofactor matrix A = Adj A =’=

Q38 of 98 Page 314

If A =then adj A=?

To find adj A we will first find the cofactor matrix

C₁₁ = 3 C₁₂ = -1

C₂₁= -5 C₂₂ = 2

Cofactor matrix A =

Adj A =’

If A =and A² + xI = yA then the values of x and y are

If matrices A and B anticommute then

If A = and B is a square matrix of order 2 such that AB=I then B=?

If A and B are invertible square matrices of the same order then (AB)^-1=?