To find adj A we will first find the cofactor matrixC11 = d C12 = -cC21= -b C22 = aCofactor matrix A = Adj A =’=

Q13 of 98 Page 314

If A =then adj A=?

To find adj A we will first find the cofactor matrix

C₁₁ = d C₁₂ = -c

C₂₁= -b C₂₂ = a

Cofactor matrix A =

Adj A =’

If A =be such that A + A^’ = I, then α =?

If A=is singular then k=?

If A =and A^-1=then x=?

If A and B are square matrices of the same order then (A + B)(A – B) = ?