DeterminantHard

Question

If A = (aij) is a  4 × 4 matrix and cij is the co-factor of the element aij in Det (A) , then the expression a11c11 + a12c12 + a13c13 + a14 c14 equals-

Options

A.0
B.− 1
C.1
D.Det. A

Solution

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