Q42 of 98 Page 314

If │A│=3 and A^-1=then adj A=?

^-1= adj A

adj A = x A^-1

= 3 x

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

If A=, then A^-1=?

If A is an invertible matrix and A^-1 = then A=?

If A= and ƒ(x)=2x² – 4x + 5 then ƒ(A)=?

If │A│=3 and A-1=then adj A=?