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
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