question_answer 89)

If x, y, z are non zero real numbers, then the inverse of matrix              is       (a)        (b)        (c)        (d)   

Answer:

.             A11 = yz; B12 = 0; B13 = 0       A21 = 0; B22 = zx; B23 = 0        A31 = 0; A32 = 0; A33 = xy                                            (a) is true.