Find the cofactors of all the elements of the determinant .

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

Co-factor of element aij, Aij = (–1)i+j Mij

Co-factor of element 3 = (–1)1+1.1 = 1,
Co-factor of element – 2 = (–1)1+2.7 = – 7,
Co-factor of element 7 = (–1)2+1.(– 2) = 2 and
Co-factor of element 1 = (–1)2+2.3 = 3,

Answered by  | 4th Jun, 2014, 03:23: PM